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My 9 month old American Pit Bull Terrier Maximus has been throwing up on a regular basis for MONTHS! We have had blood work, changed diets and everything. My vet thinks he just has a sensitive stomach or is eating something like sticks or bushes. Would sticks even cause this? (which I never see him do). This has been my vet since I was a child and first got my mini poodle. He has always been great and extremely knowledgable... however I am sick of my puppy being sick.

Some people say that white dogs tend to have more sensitive stomachs than others... even if this is so, what can I do? I can't look at his cute little face and see him sick anymore.

I will give you some facts: He is currently on OMH Wellness brand dog food for puppies. Supposedly, from my research this is a great brand of dog food. He is very active, we go to the dog park, agility etc. regularly. He eats and is fine for days, then he throws up for days. His stool is usually either soft or very loose... never firm or dark like my poodles was (sorry to get graphic). He tends to eat grass when we go to the park... no matter how much I stop him- which from what I know means he's already nauseous or has an upset stomach. Today was the worst I've ever seen his stool... it looked stringy and reddish- like there was blood in it. Maybe I'm overreacting about that- but I am very worried about this. Just when I think he's starting to get better he starts throwing up again. Does anyone have any idea what this could be? He's had all of his shots, including bordetella and was dewormed back when he was younger.

I would appreciate it so much if anyone who has any ideas on this could try and help me out. Thanks!