My 3 and 1/2 year old Old English Bulldog has bit my husband several times. She has never been beat or anything like that. It seems that when we go to bed (she sleeps with us) if my husband leans over her to kiss her or me, she becomes defensive and attacks him. It happend again last night and even though I guess she won't be sleeping in our bed anymore, I'd still like to know why this started.