Post 8 on this thread might be helpful!
http://www.yorkietalk.com/forums/sic...g-dosages.html I think a vet check is always important, you don't know if it's something serious, like a bowel obstruction or pancreatitis. I think it's always good to have a good phone relationship with your vet and his staff, they don't want you running in for every little thing, and they can ask you specific questions, to see, if it's urgent. If you don't trust your vet enough for this, it may be time to find a new vet.