Watch The Initial Reaction
As you enter a dog's enclosure, notice whether they come up to you or stand back a bit. Woodard says the dog that hangs back could be more fearful and might not love the adrenaline rush of crazy expeditions. The dog that comes right to you is likely more of a go-getter. However, "shelters are difficult places to get a real feeling for a dog; get him out and into a different space," says Woodard.