In principle, you know when a dog is happy to see you, and when not. People wag and bark too, in different ways. When two dogs approach each other wagging, expecting friendship, the outcome is almost always good. When one or more dogs are barking, it is hard to make good group decisions.
Practical Tip: Approach people wagging, expecting good things. Carry a sunny disposition. Look for the good in every person and in every situation…and let your optimism show. Wag more. Bark less.
– Craig Freshley