Good evening! My 5 month old kitten got neutered on Weds 2/26/20 & I had to go back Friday 2/28 because the tattoo site was gashed open, not just scraped. I took him back in, they cleaned the area & put in a staple & gave him a shot of antibiotics. He also was diagnosed with mild conjunctivitis and was given Erithromycin ointment to put in his eyes 2 times a day. He seems fine, playing, running around & eating. Yesterday 3/1 I noticed he had thrown up. Today 3/2 we have cleaned up little piles of vomit 4 times. What could be wrong with him?