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Kim HS, Li S, Zheng Y, Aldrich CG. Apparent total tract digestibility and palatability of extruded diets with graded levels of whole soybeans by dogs. Front Vet Sci 2023; 10:1137788. [PMID: 37275615 PMCID: PMC10233050 DOI: 10.3389/fvets.2023.1137788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/02/2023] [Indexed: 06/07/2023] Open
Abstract
Fat has high energy density and is considered one of the primary energy sources for dogs, however, increasing fat level in dry dog food has been challenging due to the lubrication and limitation of the coating system. The objective was to determine the effect of whole soybeans (WSB) on nutrient digestibility, stool quality, and palatability by dogs. The corn gluten meal, chicken fat, and brewers rice were replaced by WSB at 10, 20, and 30% (WSB10, WSB20, and WSB30, respectively) in the base diet (WSB0). Twelve beagles were randomly assigned. The digestibility trial was duplicated 4 × 4 Latin square design where dogs were allowed a 9-d adaptation followed by a 5-d total fecal collection for each period. Least-square means were analyzed with a single degree of freedom contrasts and significance at α = 0.05. Palatability was determined with a 2-bowl test by 20 beagles for 2 d with each WSB diet compared to the WSB0. First choice preference between two diets and total food consumption were recorded. Individual intake ratios (IR) were calculated (intake of each diet/total intake) for each dog. First choice (FC) was analyzed by a Chi-square probability, and the diet consumption was compared by a Wilcoxon signed rank test and a 2-way analysis of variance. Fecal moisture, output, and defecation frequency increased linearly (P < 0.05) as WSB increased. Apparent total tract digestibility of dry matter, organic matter, crude protein, fat, and gross energy decreased linearly (P < 0.05) as dogs fed the increased level of WSB. The fresh fecal pH in dogs decreased linearly (P < 0.05) as WSB content increased. The acetate, propionate, and the total short-chain fatty acid concentration increased linearly (P < 0.05) while the total branched-chain fatty acid concentration decreased linearly (P < 0.05) as WSB increased. Dogs had greater (P < 0.05) FC for WSB diets than WSB0, but there was no difference among treatments for diet consumption and IR. In conclusion, additional thermal processing before extrusion may improve nutrient digestibility of WSB. The stool quality and palatability were not affected, and fermentation in hindgut increased by WSB by dogs.
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Affiliation(s)
| | | | | | - Charles G. Aldrich
- Grain Science and Industry Department, Kansas State University, Manhattan, KS, United States
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Kilburn-Kappeler LR, Aldrich CG. Evaluation of a yeast β-glucan blend in a pet food application to determine its impact on stool quality, apparent nutrient digestibility, and intestinal health when fed to dogs. FRONTIERS IN ANIMAL SCIENCE 2023. [DOI: 10.3389/fanim.2023.1125061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Oral supplementation of β-glucans may be able to improve the health of companion animals. However, little is understood regarding the effects of yeast β-glucan on diet processing and intestinal function. Therefore, the objectives of this research were to determine the carry through of yeast β-glucan during extruded diet production and its impact on diet utilization by dogs. Three diets were formulated to contain increasing levels of a yeast β-glucan blend at 0, 0.012 and 0.023% inclusion. Processing inputs were held constant during extrusion to allow for evaluation of output parameters and physical characteristics of kibble. Yeast β-glucan concentration was analyzed in extruded diets using the glucan enzymatic method, resulting in >100% recovery. Twenty-four Labrador Retrievers were assigned to one of three dietary groups of 8 dogs each with an equal distribution of sex and age. Dogs were fed dietary treatments for 24-d adaption followed by 4-d total fecal collection. Feces were scored on a 1-5 scale, with 1 representing liquid diarrhea and 5 hard pellet-like with a fecal score of 3.5-4 considered ideal. Fresh fecal samples were collected for analysis of short chain fatty acid concentrations. Apparent total tract digestibility was calculated by total fecal collection (TFC) and titanium (TI) marker methods. Data were analyzed using a mixed model procedure in software (version 9.4, SAS Institute, Inc., Cary, NC). Dry bulk density, kibble diameter, and kibble length did not differ among dietary treatments. Intake was similar among dietary treatments (P > 0.05). Dogs required about 26% more food than estimated [130*BWkg0.75] to maintain body weight among all treatments. Fecal score was not different (P > 0.05) among dietary treatments but was lower than ideal at an average of 2.6. Nutrient digestibility was not affected (P > 0.05) by inclusion of the yeast β-glucan. By method, the TFC procedure resulted in higher (P< 0.05) digestibility values when compared to the TI procedure. In addition, yeast β-glucan did not alter short or branched chain fatty acid proportions. Overall, processing parameters, physical characteristics of kibble, stool quality, nutrient digestibility, and intestinal health in dogs were not affected by the yeast β-glucan blend.
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Acuff H, G. Aldrich C. A Review of Application Strategies and Efficacy of Probiotics in Pet Food. Vet Med Sci 2022. [DOI: 10.5772/intechopen.105829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
In companion animal nutrition, probiotics (direct-fed microbials) are marketed as functional ingredients that add value to pet foods due to the impact they have on gastrointestinal and immune health of dogs and cats. The nature of the beneficial effect each probiotic strain exerts depends on its metabolic properties and perhaps most importantly, the arrival of a sufficient number of viable cells to the large bowel of the host. Pet food manufacturing processes are designed to improve food safety and prolong shelf-life, which is counterproductive to the survival of direct-fed microbials. Therefore, a prerequisite for the effective formulation of pet foods with probiotics is an understanding of the conditions each beneficial bacterial strain needs to survive. The aims of this chapter are: (1) To summarize the inherent characteristics of probiotic strains used in commercial pet foods, and (2) To review recently published literature on the applications of probiotics to pet foods and their associated challenges to viability.
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Sui Y, Zhang X, Wang H, Yu F, Zheng L, Guo Y, Lu Y, Chen M, Wang B, Dai H, Liu F, Li J, Dong H, Tong C, Zhang L. Prevalence and genetic diversity of Giardia duodenalis in pet dogs from Zhengzhou, central China and the association between gut microbiota and fecal characteristics during infection. One Health 2022; 14:100401. [PMID: 35686142 PMCID: PMC9171527 DOI: 10.1016/j.onehlt.2022.100401] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/12/2022] [Accepted: 05/12/2022] [Indexed: 11/19/2022] Open
Abstract
As a common zoonotic intestinal parasite, Giardia duodenalis could infect humans and various mammals worldwide, including pet dogs, leading to giardiasis. This study detected the infection of G. duodenalis in asymptomatic pet dogs in Zhengzhou, and evaluated the possibility of zoonosis and the relationship between gut microbiota and fecal characteristics. We randomly collected 448 fresh fecal samples from Zhengzhou, and G. duodenalis was screened based on the beta-giardin (bg), glutamate dehydrogenase (gdh), and triose phosphate isomerase (tpi) genes. The difference of gut microbiota between five G. duodenalis-positive and five G. duodenalis-negative samples was investigated by 16S rRNA gene sequencing. The overall prevalence of G. duodenalis was 7.1% (32/448) based on bg, gdh, and tpi locus, two G. duodenalis assemblages (C = 13, D = 14) and five (15.6%) mixed infection (C + D) were identified. Moreover, compared with the G. duodenalis-negative group, the diversity of gut microbiota increased in G. duodenalis-positive group. The decrease of Lactobacillus spp. and considerable increase of Prevotella spp. were associated with the fecal characteristics. These results show that the transmission of zoonotic giardiasis between humans and pet dogs is rare in Zhengzhou, central China, and support the use of Lactobacillus spp. as a potential probiotic agent to improve intestinal health in dogs, or even humans, by treating G. duodenalis. Therefore, the public health significance of G. duodenalis to humans, companion animals, and the environment should be further evaluated from One Health perspective. Prevalence of G. duodenalis was 7.1% in pet dogs in Zhengzhou, central China. G. duodenalis assemblage D infection is associated to higher gut microbial diversity. The abundance of Prevotella and Lactobacillus may affect fecal characteristics. Lactobacillus may be used as a potential feed additive to treat giardiasis. Effective strategies should be taken to minimize the threat posed by G. duodenalis.
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Affiliation(s)
- Yuzhen Sui
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Xiangqian Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Haidong Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Fuchang Yu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Liping Zheng
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Yunan Guo
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Ying Lu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Minghui Chen
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Bukang Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Hongyu Dai
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Fang Liu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Junqiang Li
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
| | - Haiju Dong
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
- Corresponding authors at: Longzihu Campus of Henan Agricultural University, Zhengzhou 450046, Henan Province, People's Republic of China.
| | - Chao Tong
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
- Corresponding authors at: Longzihu Campus of Henan Agricultural University, Zhengzhou 450046, Henan Province, People's Republic of China.
| | - Longxian Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, People's Republic of China
- Corresponding authors at: Longzihu Campus of Henan Agricultural University, Zhengzhou 450046, Henan Province, People's Republic of China.
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