Hello, my 7 yr. old POA does not seem to like my family and it is making them nervous to be around him. He has only lived at our place for two weeks, although I have had him for five months. When my husband or daughter are around him he will pin his ears and be aggressive toward them. He has bitten my daughter's shirt and tried to bite their hands. He is also starting to be aggressive to our 15 yr.old gelding. If the horses are together, he will not let anyone around the other horse and will move him or bite him. When I watch the two together in the field, he is a bully and is constantly moving him. I know that he doesn't love to be groomed or petted, so they don't need to do that. Last night, when my daughter was standing next to me he pinned his ears and all we were doing was talking together. I don't want my family to fear him, is there something I can do to use the PICNIC way to stop this behavior?