Hello, my husband got me three cockatiels about a month and a half ago. I spend hours each day trying to get them to come to me. I have never grabbed them!! They just seem to always hiss at me and "run" away from me. I touched one on one occasion and he bit me! How do i train these guys to come to me and be nice?? They wont even take treats i try to give them. HELP PLEASE!!!!