That brooder will be plenty big for 15-20 chicks. My 55 gallon ones can get 20 chicks to 2 weeks without cleaning, just adding a fresh layer of shavings every day. I've got 40 chicks to 1.5 weeks in it once but I had to add shavings a couple times per day and I think I completely cleaned it out once. It was definitely a little cramped with 40 chicks once they got around 6 or 7 days old...
Last edited: