hi, i have a kitten (6 month old male) who has thrown up around 4 times in the last month and a bit who previously hadn’t thrown up once before. at the start of last month he had his first vaccination and was completely fine, however about 5 days later he threw up and then he threw up around another 3/4 days after that. earlier last week, he went for his second vaccination and again, was completely fine until 5ish days later where he threw up and then again threw up around an hour ago. at these vet visits, he’s also been having flea treatment (feb visit he also was given a dewormer). other than throwing up, his behaviour has been completely normal, even right before and after throwing up. as the title says, at what point does it become a great concern, is this normal?