Q. Our 14 yr old dog didn't want to eat after fatty tumor surgery- dr took her bloods 15 days later, which were perfect before now say kidneys failing
A. Sometimes anaesthetics can have side effects that affect kidneys especially in older animals it is a greater risk. You need to be guided by your vet as they have all the results and have examined your dog. Certainly your dog will need to be on intravenous fluids for some days and regular blood tests to recheck kidneys. It maybe something that can improve with fluids alone, sometimes medications can help, sometimes there is nothing. It is a matter of time and fluid treatment to see what the situation will be.