The quality that makes a dog successful in the following paragraph is what? the secret of a dog's success in handling a man is patience. some men are a little slow to respond, but a dog who makes allowances and tries to put himself in the man's place will be rewarded with a loyal pal. my setter has broken me so thoroughly that i have decided to set down a few basic rules of manhandling, as a guide for other dogs who happen to own friends of mine. slowness intelligence consistency patience