Swishing tails and friendly question marks
Dominant dogs keep their swishing tails up, while relaxed dogs keep their tails in a relaxed U-shape. When a dog is excited, it splashes from his whole body. His ears and body are relaxed, he has a relaxed, non-staring look and his tail swishes happily back and forth.
A cat can use its tail to tell anyone from afar whether you can come closer or not. Is a cat happy to see you or curious? Its tail then shoots straight up into the air. If your cat is relaxed and happy, its tail stands straight up and the tip curls down like a U or question mark.