I have 3 chick's from a litter of 10. They are maybe a month old. Only 1 black from all 10. Been feeding them chicken feed... noticed the black one last week has a little blood in his stuff. Today his tummy is HUGE. I dunno if it's because he's a rooster, ( if he is I'm just guessing), did someone 'help' me and feed them something or let them out and he ate something... it is this normal? I dunno what to do... the other 2 are fine.