i've had 2 that never yapped, maloneys roxy never yapped, her litter sis tina never yapped her litter bro tiger never yapped and her other bro sam never yapped, me mate has a tool of a dog out of him that dont yap, mate has a bitch out of him to a smokey dancer bitch that dont yap...........old judy gave odd yips when she wasn't fit and me mates bitch give odd yap when not fit so 2 from all them isn't bad...........maybe the ones you seen were off bad stocksman
paul greves buddy stuff yap,they kill the hares but they yap,the others ive seen yap and its not the stock men,ive heard of others ya