I have a 7 month old German Shephard who bites (nips) and jumps at me for no reason! She drives me crazy! I'll be sitting on the couch and she'll be laying on her bed, chewing her bone, then out of nowhere she comes to me and starts nipping and jumping. Don't get me wrong, they are not mean bites at all, they are very painful bites though because she's freaking huge! Please, someone help me. I've tried removing myself from the room, i've tried spraying her with water, i've tried holding her close to my body until she calms down... nothing works. Suggestions!?!