Has she had any trouble pooing? Like struggling to get it out? Sometimes if they have swallowed something they shouldn't have they can have problems trying to get it out. Hopefully, the vet can get a good look. Poor baby. It so awful when they can't tell us what is bothering them.
Gracie somehow got part of a string inside her and she had an awful time getting it out. With a little assistance she finally got it out. I don't know how she finds these things.
