My dog has had diarreha for the past 3 days and he just threw up light pink stuff, is this blood? He has been on Benadryl for the past 2 weeks because he has a Mast Cell Tumor and is having surgery on Monday morning, could this have anything to do with it?
It sounds like a gastrointestinal bleed. You need to take your cat to the ER,
It sounds like blood. He could have coughed up a piece of hard food or a hairball. Keep an eye on him hif it get to be more then call your vet