I spay my dog when she turned 5 months. After a month I noticed she lost her appetite. I brought her to the the vet, changed her food but didn't work.The Vet told me she looks fine, prescribed an stomach medication to see if it gets better. But still the same. She looks very picky eater now. If I put her on my lap and if I try hard she started to eat slowly but I do not want to do it every day. Any suggestions??