Quote:
Originally Posted by bchgirl  Any chance you're feeding puppy ...puppy food that the older one is eating? Puppy formulas have a higher protein content and older dogs can gain weight from it. |
That was my first thought, that she might be getting into the puppy's food.
Please take her to the vet. The key to keeping seniors healthy and extending their life is to get yearly bloodwork and physicals and to take them to the vet whenever something is "off". Ignoring symptoms will only make things worse and more expensive.