16 year old Diesel was diagnosed with kidney disease. Animal Nutritionist, Narelle Cooke, worked with Diesel's vet to prescribe Diesel to support his health condition.

https://www.bigdogpetfoods.com/frequently-asked-questions/are-your-recipes-suitable-for-dogs-with-renal-kidney-issues

Pooches at Play, Series 6, episode 3 - Kidney disease in dogs