Can dogs just get stomach aches from eating stuff? yoshi got into my parent's dog's food and ate quite a bit off it. it was this morning and she seems to be passing it normally. but tonight she won't wolf down her treats like usual she'llt ake it and set it down and walk away and later might go back and eat it. she'll play and gets excited over people knocking on the door like usual but she isn't really eating. could she just have a stomach ache from eating so much of an unfamiliar food? or are their stomachs ok with that?