We brought home a new puppy 3 weeks ago. She is a 3 month old Bullmastiff. We already have an 8yr old Boxer (female) and a 3yr old American Eskimo (male). She gets along fine with the Boxer but she is constantly chasing after
the American Eskimo. She nips at him, chases him and takes his toys. Everything I've read says to let them work it out but she's relentless and my American Eskimo seems miserable. How long should I let this go on? And should I interfere?