bichon Frise, Yorkshire terrier :2thumb:The only dogs i know of that dont moult (wich wouldnt guarantee he wouldnt be allergic) are poodles, shihtzus, lhasa apso's, sure theres a couple more but cant think.
Best bet would be to settle on a breed and visit a few with your brother, to make sure he doesnt react : victory:
very good point their lisa :2thumb:Are you sure it's the dog hair they're allergic to? Most people are allergic to the dander and saliva, and if that's the case, there is no dog that will be any good for an allergy sufferer.
There is a product you can use called Petal Cleanse though:
Allergy Preventatives - Bio-Life International Ltd=
As for dogs who moult less, greyhounds dont moult much (apart from when they're brought in from the kennels into a warm home). Edit: probably not collie to pointer sized, but they do curl up small!