probably not a good sign. might wanna get her to the vet first thing in the AM in case it's something they can fix. especially if he/she starts throwing up.
This. One of my dogs is going thru this. He is over 14 years old. My Vet is making a house call the first thing today. Oh, my Vet is my daughter. I;m sure she will be taking him home with her due to me not being able to take care of him.