by Teri Ann Oursler, DVM
A month ago my sister wanted to know if her Jack Russell Terrier could be sick because he was drinking and peeing all the time. I told her he needed to go to the vet; he could have a simple urinary tract infection or he could have more going on. Inside my head, I was screaming “diabetes” as polyuria/polydipsia (drinks a lot and pees a lot), or PU/PD as medical types call it, is a hallmark for diabetes mellitus in dogs, cats, and people. In dogs, diabetes mellitus rarely responds to dietary changes – unlike some people and some cats – and almost always requires twice daily insulin injections to control the disease.