I have a 3 1/2 year old Pitbull/Rotweiler mix. He is growling or groaning at me and I'm not sure why. He make the noise and wants my attention he licks me or rubs his head on me for attention. It's not aggressive behaviour at all. He is very much my husbands dog and doesn't pay much attention to me. He does it usually when my husband is right there or in view mostly. Is he just trying to show me he's dominant and prefers my husband?