Sounds like you're on the right track
. Just a quick question that crossed my mind bc of your user name "grapeguzzler" -- are you giving him grapes? Bc if you are, I just wanted to mention that dogs shouldn't have grapes at all - and that if you are giving them, they'd definitely contribute to GI problems....not to mention, they can be deadly toxic to dogs.
I hope he is on the mend and feels better soon.