Hello! Welcome to BYC! Sorry about the loss of your brother that`s a tough one... I lost my only sister almost exactly a year ago to Altzheimers. 😭 I don`t know what to do about her comb but someone will. You may want to start a thread on the emergency/diseases/injuries and cures forum. Good luck! 😊
Hatchery birds sometimes do not get as big as birds from a breeder! We have one BJG hen that weighs 8lbs and 4 LB hens that are just under that! A bigger door size won`t hurt anything anyway!