I think the reason he suggests exchanging dogs with some people on the show lately is because he gives the people a dog whose energy level matches theirs better. Then the dog who had behavioral issues which the owners couldn't correct goes on to live in Cesar's doggie sanctuary rather than eventually bite someone then be put to sleep by animal control. Not sure if that's the whole procedure in trading pokemon cards, but if I had a dog I knew I just couldn't handle I'd be willing to let it live out the rest of it's life at the Dog Psychology Center playing fetch and running around with other dogs every day in a happy and balanced state.