When Your Cat Wags Its Tail
When dogs wag their tails back and forth, it indicates that they are happy and excited to see you. This is not true for cats, who wag their tails when they want to be alone. The swishing action indicates that they are agitated, therefore the best thing you can do is stay away. If its tail is twitching, it indicates that they are interested in what is going on around them. The twitching indicates that they are attentive or are paying close attention to anything nearby.

When Your Cat Wags Its Tail