I am a social worker/bereavement counselor for a hospice. We see the phrase "failure to thrive" as a diagnosis for some of our clients. Are you in the health field since you used that phrase?
I started out with 2-6 month old chickens, Red the Rooster (RIR) and Goldie (Brown Leghorn). Bought 15 from a hatchery (kept 6 and gave away the rest). Then 16 the next year and put them in a different area/yard. Now have another batch of 22 4-week old chicks. Plus, I decided to let my buff go broody and Wed. she hatched out 2 (out of 6 eggs). First time letting a hen hatch eggs. Needless to say, they are precious! Watching them interact with mama is priceless! Now a friend has week old Easter Eggers she is going to give me. So I hope THAT's IT for a while!
I think that makes 46.