I have a 8 month old Shi Tzu/Pekingese and he is up to date on all of his shots. Thursday night, I put his monthly dosage of advantage on his skin, and Friday evening he began throwing up everytime he ate. He uses the restroom in my backyard unattended and I'm hoping he didn't eat something or drink from some dirty standing water. He's still very active, but I just need to know what I can do to stop him from vomitting and getting worse.
Optional Information:
Age: <1; Male; Breed: Shi Tzu/ Pekingese
Already Tried:
Nothing