Inappropriate urination is often the first noticeable sign something is wrong. Increased thirst means this has been going on long enough to be a total body problem. I would put a lot of effort into getting her seen sooner than later…going too long can and will cause further damage to her already very sick body.
(Dr. M told me bad breath is kidneys. Expect a full urinalysis and bloodwork, plus the possibility of subcutaneous fluids and prescription diet.)
Good morning-
You really need to discuss this with your vet as they know your pet best. Everyone/thing is unique and reacts in their own way. I would talk with the vet and also ask about other methods of pain relief. Best of luck.
I agree with Sarah. There is the book instruction for a drug and then there is the real life patient specific advice. If gabapentin isn’t working ask for other options. There are always options.