Yankeemom, have you had your dog checked for tick-borne diseases? They can be hard on the kidneys. Even if the tests are negative, it might be a good idea to try a course of doxycycline with your dog--some of the TBDs are hard to detect and some of the emergent ones are new enough that they haven't been identified yet.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."