We got the old doggy blues...

Our black lab, Cody, is 11 and a half years old. Old for a big dog. She is very sweet and just wants to be loved. Lately, she has been drinking A LOT of water and then needing to pee a lot. She's even had some accidents in the middle of the night. She's been a little goofy for a while, too. We've scheduled an appointment at the vet for this coming Tuesday. I'm hoping that maybe we can change her food and it will take care of the problem.