At first, Max is really not happy when his owner brings home another dog named Duke. However, they are able to set aside their differences for the greater good when they realize their owner is in danger and work together to save him.
Dogs are known for their loyalty and protective instincts, and this is never more evident than when they are faced with a danger to their owner. No matter what their individual differences may be, dogs will work together to save their owner from harm. This is a testament to their strong bond with humans and their instinct to protect those they love.