I have some baby chicks, ranging from 2 weeks old today, and I'd say maybe 3.5-4 weeks (not sure, that will be posted in a different thread). I hatched one of the chicks myself, the one I know is 2 weeks, two came from a breeder 1.5 weeks ago, and the other one was adopted on Tuesday. I got three to keep my first and only hatchling company; social animals wither away in solitude. However, one died 2 days after I got her. The man I bought them from wouldn't replace her. Not knowing why she died, I waited a week to check for signs of illness in the remaining chicks before adopting an Ameraucana from a girl who got bored with her chick after 3 days... (I'm sure this happens a lot, people suck). I was wondering if I should vaccinate my chickens (hopefully there's a vet near where I live that does it, as chicken keeping has to be kept underground— my neighbors are okay with it though ). And if I should vaccinate, what vaccines should I get for my small flock of 4? The adopted chick had the sniffles when I picked it up, and then the next day, all of them has the sniffles, however I've noticed that if they get cold is the only time they sneeze (especially on our breif outside "adventures"). The day after I adopted, the oldest chick had dumped the waterer over and the bedding (and chicks) were damp, so I'm assuming that's what did it. All are still active and appear healthy.