We have a 12 week old jack russell. She does fine in her crate if we are in the room. When I leave the house and crate her she cries hysterically, howls and vomits every time. The howling and crying never stops. It doesn't matter if I am gone 30 minutes or 2 hours. While we are home she wonders in and out of the crate at will. When leaving her we always give her something to play with and a treat. I need help. I have to leave the house and can't leave her running loose.