I'm glad you found a vet to see him today. How late were you with Revolution? I believe all of the heartworm/worm meds can go a little longer than 4 weeks.
Could be any number of things. Let us know what the vet says. I think I would be inclined to request a test for pancreatitis since he was recently ill. Best wishes for your little guy.
__________________ Kristin, Max and Teddy  |