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van der Laan JE, Vinke CM, Arndt SS. Evaluation of hair cortisol as an indicator of long-term stress responses in dogs in an animal shelter and after subsequent adoption. Sci Rep 2022; 12:5117. [PMID: 35449215 PMCID: PMC9023568 DOI: 10.1038/s41598-022-09140-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 03/15/2022] [Indexed: 11/25/2022] Open
Abstract
Shelter dogs are exposed to a variety of stressors. Among non-invasive techniques, hair cortisol concentration (HCC) is suggested an easy to collect biomarker for giving insight into long-term stress responses. We evaluated HCC as an indicator of long-term cortisol responses in dogs in an animal shelter over different chronological time points during sheltering and after adoption. Hair samples were collected from the neck region following a shave/re-shave protocol of shelter dogs (total n = 52) at four different time periods: T1 intake at shelter (pre-shelter period, n = 51); T2 after 6 weeks in the shelter (n = 23); T3 6 weeks after adoption (n = 24); T4 6 months after adoption (n = 22). HCC at T2 was significantly higher than HCC at T1, T3 and T4 (effect of sample collection moment: F3,41 = 12.78, p < 0.0001). The dog’s weight class, age class, sex, reason for admission, kennel history and melanin type also explained HCC variability. No significant difference in HCC was found between shelter dogs T1 and control pet dogs in their own homes (n = 20, one sample, t = − 1.24, p = 0.219). A significant but moderate positive correlation between HCC and urinary cortisol:creatinine ratios was found (т = 0.3, p < 0.001). As HCC increased in the shelter, the use of this non-invasive parameter appears a useful additional tool in dog welfare research.
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Affiliation(s)
- Janneke Elisabeth van der Laan
- Animal Behaviour Group, Department of Population Health Sciences - Division of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80166, 3584 CM, Utrecht, The Netherlands.
| | - Claudia Maureen Vinke
- Animal Behaviour Group, Department of Population Health Sciences - Division of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80166, 3584 CM, Utrecht, The Netherlands
| | - Saskia Stefanie Arndt
- Animal Behaviour Group, Department of Population Health Sciences - Division of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80166, 3584 CM, Utrecht, The Netherlands
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Fernández V, Caselli A, Tammone A, Condorí WE, Vanstreels RET, Delaloye A, Sosa C, Uhart MM. Lead exposure in dogs fed game meat and offal from culled invasive species in El Palmar National Park, Argentina. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:45486-45495. [PMID: 33864223 DOI: 10.1007/s11356-021-13880-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
This is the first field study to evaluate lead exposure in dogs fed game meat and offal and, to our knowledge, the first study exploring associations between game consumption and dog health status. We quantified lead concentrations in blood and hair and haematological parameters of 31 dogs fed game meat and offal from wild boar (Sus scrofa) and axis deer (Axis axis) culled with lead ammunition in El Palmar National Park, Argentina. Despite variable weekly frequency in game consumption, dogs had detectable blood and hair lead levels, demonstrating recent and chronic exposure. Lead geometric mean and SD were 18.91 ± 346.85 μg/dL w.w. in blood (range = 0.53-216.58), and 0.721 ± 6.444 μg/gr d.w. in hair (range = 0.007-34.800). Hair lead levels were relatively low in most samples, except for the oldest dog which had an atypically high value concurrent with anaemia, a common outcome of chronic lead exposure. Dog's owner was significantly predictive of both blood and hair lead levels, which reflects the same feeding patterns for all dogs owned by the same person. Body condition was associated with hair lead, with dogs in good condition presenting higher lead levels. This could be related to greater game consumption by those dogs, resulting in higher lead ingestion. Dogs fed game meat and offal at very low or low frequency (≤4 times per week) showed higher blood lead levels, suggesting there might not be a risk-free frequency for game provision to dogs. Considering the risks of dietary lead exposure, avoiding feeding dogs lead-killed game and replacing lead ammunition with non-toxic alternatives are recommended. This would allow using hunted game as a valuable food resource without unnecessary risk for the health of consumers and the environment.
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Affiliation(s)
- Valentina Fernández
- Programa de Conservación Comunitaria del Territorio, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina.
| | - Andrea Caselli
- Programa de Conservación Comunitaria del Territorio, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - Agostina Tammone
- Programa de Conservación Comunitaria del Territorio, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
- Centro de Investigaciones Veterinarias (CONICET-CIVETAN), Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - Walter Ezequiel Condorí
- Programa de Conservación Comunitaria del Territorio, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - Ralph Eric Thijl Vanstreels
- One Health Institute, School of Veterinary Medicine, University of California, Davis, CA, USA
- Institute of Research and Rehabilitation of Marine Animals (IPRAM), Cariacica, Espírito Santo, Brazil
| | - Aldo Delaloye
- Parque Nacional El Palmar, Administración de Parques Nacionales, Ubajay, Entre Ríos, Argentina
| | - Cristian Sosa
- Parque Nacional El Palmar, Administración de Parques Nacionales, Ubajay, Entre Ríos, Argentina
| | - Marcela María Uhart
- One Health Institute, School of Veterinary Medicine, University of California, Davis, CA, USA
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Jimbo M, Matsumoto N, Sakamoto H, Yanagawa Y, Torii Y, Yamanaka M, Ishinazaka T, Shirane Y, Sashika M, Tsubota T, Shimozuru M. Hair Growth in Brown Bears and Its Application to Ecological Studies on Wild Bears. MAMMAL STUDY 2020. [DOI: 10.3106/ms2020-0021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Mina Jimbo
- Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Naoya Matsumoto
- Noboribetsu Bear Park, 224 Noboribetsuonsencho, Noboribetsu, Hokkaido 059-0515, Japan
| | - Hideyuki Sakamoto
- Noboribetsu Bear Park, 224 Noboribetsuonsencho, Noboribetsu, Hokkaido 059-0515, Japan
| | - Yojiro Yanagawa
- Department of Clinical Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Yoshiko Torii
- Department of Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Masami Yamanaka
- Shiretoko Nature Foundation, 531 Iwaubetsu, Shari, Hokkaido 099-4356, Japan
| | | | - Yuri Shirane
- Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Mariko Sashika
- Department of Environmental Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Toshio Tsubota
- Department of Environmental Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Michito Shimozuru
- Department of Environmental Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
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Schuldenfrei MD, Pieper JB. Evaluation of hair follicle parameters using TrichoScale Pro © in healthy dogs: a pilot study. Vet Dermatol 2020; 31:181-e37. [PMID: 31898370 DOI: 10.1111/vde.12836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2019] [Indexed: 01/11/2023]
Abstract
BACKGROUND Trichoscopy, in combination with image analysis software, is a readily available, efficient diagnostic tool for assessing hair follicle parameters of people in vivo. Systems designed for use in human dermatology must be evaluated and validated with animal skin/hair before they can be used for veterinary applications. OBJECTIVES To evaluate the use of a commercial software package for image analysis of canine hair follicles and to define hair follicle parameters. ANIMALS Thirteen client-owned healthy dogs. METHODS Trichoscopic images at x20 magnification were obtained from three shaved body sites (left dorsal head, left thorax, left flank) over a five day period, then analyzed by the software. RESULTS The image analysis software was able to identify microscopic changes in hair length on a daily basis, calculating a mean hair growth rate of 0.065 mm/day. Each of the three body sites had consistent hair growth rates across all days. Anagen and telogen percentages were consistent at each body site by Day 2 (48 h post-clipping). Data for mean hair thickness, and primary and secondary hair percentages also are reported. CONCLUSIONS Although it provides less useful data for canine hair coats than for human scalp hair, the system evaluated provides an easy, noninvasive, rapid means for assessing several important canine hair follicle parameters: daily hair growth rates, anagen and telogen percentages, primary and secondary hair percentages, and mean hair thickness. This diagnostic tool could serve to establish breed-specific hair coat standards, evaluating hair follicle changes in various canine alopecic conditions and monitoring coat-promoting treatments in dogs.
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Affiliation(s)
- Marvin D Schuldenfrei
- Department of Veterinary Clinical Medicine, University of Illinois Veterinary Teaching Hospital, 1008 West Hazelwood Drive, Urbana, IL, 61802, USA
| | - Jason B Pieper
- Department of Veterinary Clinical Medicine, University of Illinois Veterinary Teaching Hospital, 1008 West Hazelwood Drive, Urbana, IL, 61802, USA
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Watson A, Wayman J, Kelley R, Feugier A, Biourge V. Increased dietary intake of tyrosine upregulates melanin deposition in the hair of adult black-coated dogs. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2018; 4:422-428. [PMID: 30564763 PMCID: PMC6286625 DOI: 10.1016/j.aninu.2018.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 02/12/2018] [Accepted: 02/13/2018] [Indexed: 10/25/2022]
Abstract
The principle determinant of melanin derived hair colour and patterning in mammals is genetic, but environmental factors are now thought to play a role. It has been shown that the concentration of melanins in cat hair is influenced by the amino acid composition of their diets. Also, puppies were found to require tyrosine (Tyr) intake significantly greater than that recommended for normal growth and development in order to optimize melanin expression in their coats. Much of the work to date has been conducted in growing animals. Less is known about the relationship between nutrition and hair melanin deposition in healthy adult animals. In this study, we fed 2 groups of adult black Labrador retrievers (12 dogs/group) different concentrations of Phe + Tyr (5.6 vs. 3.5 g/Mcal) for 24 weeks and used spectrophotometric measurements every 8 weeks to detect any associated changes in the dogs' hair colour. The higher intake dogs showed reduced dilution of their black coat pigment compared with the lower intake dogs. Specifically, following 16 weeks at the higher intake, the dogs showed less yellow pigmentation to their coats (P = 0.0032), and after 24 weeks at the higher intake, the dogs showed less red (P < 0.0001) and yellow (P< 0.0001), as well as greater overall dark pigmentation (P < 0.0001). In conclusion, we have demonstrated for the first time that colour expression in the hair-coat of adult dogs is dependent on dietary intake of Tyr, and that the requirement appears to be in excess of the minimum level recommended to maintain health.
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Affiliation(s)
- Adrian Watson
- Royal Canin Research Centre, 30470 Aimargues, France
| | - Jamie Wayman
- Royal Canin Pet Health Nutrition Center, Lewisburg, OH 45338, USA
| | - Russell Kelley
- Royal Canin Pet Health Nutrition Center, Lewisburg, OH 45338, USA
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Berger DJ, Lewis TP, Schick AE, Miller RI, Loeffler DG. Canine Alopecia Secondary to Human Topical Hormone Replacement Therapy in Six Dogs. J Am Anim Hosp Assoc 2015; 51:136-42. [DOI: 10.5326/jaaha-ms-6247] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Alopecia is a common presenting complaint in veterinary medicine and is known to occur secondary to numerous primary conditions. In this report, six unrelated dogs from three households were subsequently determined to have developed alopecia as a result of accidental transdermal exposure to their owners' topical hormone replacement therapy (THRT). All cases presented with alopecia ranging in duration from 2 mo to 2.5 yr. All dogs demonstrated alopecia affecting the ventral neck, thoracic and abdominal surfaces, proximal lateral extremities, and lateral trunk. At the time of initial presentation, five of six dogs were also noted to have physical exam findings suggestive of feminization. In all cases, serum total thyroxine was within normal reference range. Affected skin was biopsied in five dogs, and all samples demonstrated four similar histological characteristics: basal melanosis, epidermal and infundibular follicular hyperkeratosis, kenogen hair follicles, and small sebaceous glands. All dogs had elevated baseline estradiol levels, and four dogs had concurrent elevations of baseline progesterone. Average time to onset of clinical signs in those dogs was 5.5 mo after the owners started THRT. Following discontinuation of THRT by the owners, all dogs had complete resolution of their clinical signs by 5.5 mo.
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Affiliation(s)
- Darren J. Berger
- From the Iowa State University College of Veterinary Medicine, Ames, IA (D.B.); Dermatology for Animals (T.L., A.S., R.M.); and DVM Pathology Associates (D.L.)
| | - Thomas P. Lewis
- From the Iowa State University College of Veterinary Medicine, Ames, IA (D.B.); Dermatology for Animals (T.L., A.S., R.M.); and DVM Pathology Associates (D.L.)
| | - Anthea E. Schick
- From the Iowa State University College of Veterinary Medicine, Ames, IA (D.B.); Dermatology for Animals (T.L., A.S., R.M.); and DVM Pathology Associates (D.L.)
| | - Rose I. Miller
- From the Iowa State University College of Veterinary Medicine, Ames, IA (D.B.); Dermatology for Animals (T.L., A.S., R.M.); and DVM Pathology Associates (D.L.)
| | - Diana G. Loeffler
- From the Iowa State University College of Veterinary Medicine, Ames, IA (D.B.); Dermatology for Animals (T.L., A.S., R.M.); and DVM Pathology Associates (D.L.)
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7
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Knottenbelt CM, Bawazeer S, Hammond J, Mellor D, Watson DG. Nicotine hair concentrations in dogs exposed to environmental tobacco smoke: a pilot study. J Small Anim Pract 2012; 53:623-6. [DOI: 10.1111/j.1748-5827.2012.01284.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- C. M. Knottenbelt
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G61 1QH
| | - S. Bawazeer
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G61 1QH
- Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161, Cathedral Street Glasgow G4 0RE
| | - J. Hammond
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G61 1QH
| | - D. Mellor
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G61 1QH
| | - D. G. Watson
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G61 1QH
- Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161, Cathedral Street Glasgow G4 0RE
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Bennett A, Hayssen V. Measuring cortisol in hair and saliva from dogs: coat color and pigment differences. Domest Anim Endocrinol 2010; 39:171-80. [PMID: 20705413 DOI: 10.1016/j.domaniend.2010.04.003] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2009] [Revised: 04/15/2010] [Accepted: 04/29/2010] [Indexed: 10/19/2022]
Abstract
Cortisol concentrations are frequently measured from a variety of sources including blood, saliva, urine, and feces to quantify stress in dogs. However, a need still exists for less intrusive collection methods in domestic animals and for more efficient means of measuring basal cortisol. The objectives of the present study were to minimize restraint for saliva sampling, to validate hair for basal cortisol measurement in dogs, and to determine concentrations of cortisol within the hair shaft and in relation to hair color. Using food luring, 79% of dogs required no restraint for saliva collection. Salivary and hair cortisol concentrations were positively correlated (P = 0.001), thus validating hair as a medium for basal cortisol quantification. Black dogs had less cortisol than nonblack dogs (P = 0.039) in hair, but not saliva. Across dogs, the average amount of cortisol did not differ between proximal and distal hair sections (P = 0.348). However, for 7 of the 9 dogs, more cortisol was present in the distal portions of the hair. We observed a difference in cortisol concentrations among hairs of different colors from individual dogs (P = 0.001). From the same 7 x 7 cm ischiatic patch from the same dog, black (eumelanin) hairs were consistently lower in cortisol than yellow (pheomelanin) hairs, and cortisol concentrations of agouti hairs were intermediate. This is the first evidence that hair of different colors might sequester cortisol differently.
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Affiliation(s)
- A Bennett
- Department of Biology, Smith College, Northampton, MA, USA
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Favarato ES, Conceição LG. Hair cycle in dogs with different hair types in a tropical region of Brazil. Vet Dermatol 2008; 19:15-20. [PMID: 18177286 DOI: 10.1111/j.1365-3164.2007.00642.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Hair cycle activity has been extensively studied in humans, sheep and laboratory animals, but there is a lack of information in dogs. Besides varying according to species, breed, sex and general health, hair growth is mainly affected by climatic variations. The aim of the study was to evaluate the follicle activity in three breeds of dogs with different hair types, in the city of Viçosa, Minas Gerais (latitude 20 degrees 45'S), Brazil. Twenty-one male dogs of boxer, labrador and schnauzer breeds were trichographically analysed monthly over 12 consecutive months. Hair percentage of telogen and anagen hairs at the different stages of the hair cycle in boxers and labradors was not significantly different, but both differed from the schnauzers. A significant correlation between hair follicle cycle and environmental temperature and photoperiod was noted in the boxers and labradors. In these breeds, a larger number of telogen hairs were observed during the hottest months of the year, and an increase in anagen hairs during the coldest months. The mean percentage of telogen hairs was 93, 90 and 55.3% for boxer, labrador and schnauzer, respectively.
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Affiliation(s)
- Evandro S Favarato
- Dermatology and Internal Medicine, Departamento de Veterinaria, Universidade Federal de Vicosa, Campus Universitario s/n, Vicosa, Minas Gerais, Brazil 36570-000
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