my 14 year old shih-shuh has been diagnosed with the beginning of kidney failure, yet he has no outward signs that i can see and still eats very well and appears to be normal, should he be on any medication as my vet has not put him on anything!
If it is the early stages and your pet is aclinical then I usually do not put the dogs on medication. I do put them on a special diet called Science Diet K/D. This diet is specially formulated for pets with kidney disease. I do recommend careful monitoring of the renal values and possibly an abdominal ultrasound. Good luck, vetcare