Table 1.
Author | Signalment | Study Design | Sample Size | Diet Type | Duration of Feeding Diet | Comparator | Outcomes Assessed |
---|---|---|---|---|---|---|---|
Animal—Based Outcomes | |||||||
Fantinati et al., 2021 [30] | 2-year-old male neutered Main Coon and a 1-year-old female spayed Domestic Shorthair cat, | Case Report | 2 | Commercial plant-based pet food | 5 mo | N/A | Clinical examination Body condition Blood hematology/biochemistry Folate (vitamin B9) Taurine Thiamine iron and serum ammonia Food intake |
Leon et al., 1992 [29] | M, F | Randomized controlled trial | 5 | High protein vegetarian diet | 6 weeks | Compared vegetarian diet versus vegetarian diet with potassium supplementation | Clinical examination Body weight Blood biochemistry Erythrocyte transketolase activity Taurine Glutamine Potassium levels |
Semp 2014 [27] | Not stated | Cross-sectional | 15 | Commercial or homemade vegan diet | Average 3.9 years, range 6 mo- 6.5 years | N/A | Clinical examination Blood haematology/biochemistry Folate Cobalamin (Vitamin B12) |
Wakefield et al., 2006 [28] | M,F Average age = 6.6 ±4.4 |
Cross-sectional | 17 | Home-prepared vegetarian diet with majority using a commercially available supplement | Average 4.4 ±3.4 years | Standard lab reference ranges | Taurine Cobalamin (Vitamin B12) |
Guardian—Reported Outcomes | |||||||
Dodd et al., 2021 [31] | M,F Mean age 7.5 ± 4.85 Mixed breeds: DSH = 660 DMH = 60 DLH = 95 Asian = 50 American = 35 Other/unknown = 154 |
Survey study- cross sectional of cat guardians | 1325 guardians 1026 cats |
Most cats had a meat-based diet n = 65%, 18% Plant Based diet, 6.7% combination. 10% indeterminable. Supplements fed to 19% being more often used when cats had PB diet (40%) |
Average 3.6 years for both diets | Responses of owners feeding meat-based diet compared with plant-based diet | Body Condition Fecal Score Health Conditions Guardian’s perception of health Lifespan (indicated for previously owned cats) |
Knight and Satchell 2021 [26] | Various, unspecified | Cross sectional survey | Guardian reports on 1135 cats | Conventional meat diet, raw meat or vegan pet food | Guardian reported palatability/feeding behavior | ||
Semp 2014 [27] | Various, unspecified | Cross sectional survey | 59 cat guardians | Commercial vegan food or self-prepared vegan diet | Average of 3.9 years | N/A | Guardian reported health |
Wakefield et al., 2006 [28] | M,F Mean age 7 years |
Cross sectional telephone survey | Vegetarian diet = 34 Meat-based diet = 52 |
Home-made vegetarian diet and conventional meat-based diet | At least 1 year | N/A | Guardian reported body condition and perceived health status |
MF: male, female.