I had a similar problem. One of my five BP's wouldn't eat once a little dog was around. I suspected it was a problem but couldn't be sure at the time. I tried keeping the dog out of the BP's sight, but I think she smelled it. I could get her to eat very small meals sometimes, but she fell behind on weight gain. Once the dog was gone, she started eating like crazy. Hope it works all works out & your baby starts eating again.