i had a 2 yr boxer bitch and a 7mth boxer dog.. 2yr was top dog in the pack status ..after the family.. they get on fine,bitch was spayed ,dog was done asap :o)
my staffie fights with my older dog, mainly through jealousy, food, attention, they are 12 and 10 and they have lived together for 8 years but still have nasty spats