Your poor baby! I'd also investigate the possibility that the boxer is being mistreated - that sort of behaviour is TOTALLY outside their nature and you know what they say - there is no such thing as a bad dog, BAD PEOPLE make dogs bad

May your prescious bubby rest in peace at the Rainbow Bridge! I know what it's like, I lost a six month old bubby to a dog and there is NO WAY I am ever letting Pixel outside now!