My dog is a four year old Bloodhound/Pitbull mix and for as long as I can remember ; anytime my cell phone rings and I begin talking on the phone, he starts attacking. It appears as though it may be possessiveness, etc. He barks, jumps up and down on me and starts nipping on me. I think he has alot of nervous energy as he barks and whines when he hears people moving around upstairs in my house. My dad said that he barks when his cell phone rings as well; however, I don't think he goes as far as jumping, nipping with my dad and I'm not sure if it is because I'm female and/or he can sense if I start to get nervous. Any ideas?