FIRST- I'd get the whole Marek thing sorted out before u sell as u sould NEVER sell birds with diseases
SECOND- if they come up total clean then consider selling them if ur brother hasnt the heart to deal with lose (which I know is very difficult to lose birds and I myself shead a silent tier...
U can say what u want to me about this but a rifle + pations= no fox which leads to happy hens which leads to more eggs which leads to u getting ur breakfast which leads to u having a good start to the day which leads to u not being as tired and hungry at work which leads to u coming home with a...
It sounds like a time change to me but very weird behavior in my opinion as long as he isn't like trying to hurt himself by doing this then there's nothing to worrie about in my opinion
I have had this before in birds but even if u try breeding to 6 toe birds to together sometimes the chicks can have 6 toes but the majority don't
It's a strange thing and I hope u can find out more about this and keep use updated
I agree it's unlikely but us be surprised what some people would swap I know a guy and he use to keep Drake's for breeders and he used to swap female ducks for good male ducks that he'd then sell to breeders in Europe
Srry meant 5
Idk if it helps that's just what id go for if I was to pick out a.silkie but then that's just my opinion so it's up to the creater to take this advise or not