Your dog could possibly be bored. To make this stop, watch them and when they start biting give them a bone/toy. You might also check for fleas or other insects, or rashes, dry skin or spots where there is no fur. There might be a condition that the vet will have to help with.
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How can I help my cat if he won't let me see whats wrong with him. He has a bite on his back end above tail.
its trying to ease its pain.
It isn't likely a cat would die directly from a bite to the tail. However, a bite would leave the cat in great pain so it is advisable to take the cat to the vet immediately. While the tail isn't a vital organ, they are delicate appendages and due to the many bones within the tail, it is easy for a tail bones to break. Sadly, a broken tail cannot be mended, and in some cases, if the injury is particularly bad or the injury is at the base of the tail (greater chance of nerve damage), the tail has to be amputated.
Her skin could possibly be irritating her or she could just be grooming herself.
playing
Well all you do is.... Its very simple, Just stand on its tail! (It may bite ya, but you asked)
Its a form of grooming or possibly because it has a itch there. may be irritation such as an itch or a slight pain perhaps
If it has children, Grab them and it will, If u step on it's tail it might. Also try taking it's food from it.
Swelling at the base of a cat's tail could mean a number of things. It could be due to a bite wound or other injuries such as a sprain. Another possibility is that someone may have stepped on his tail.
Give the cat time to recover, and let the cat approach you in its own time. It may be ideal to try and avoid the tail for a while, as it may be sensitive.
A cat may have a twitchy tail on Twitchy Tail Cat because it is a natural behavior that can indicate excitement, agitation, or alertness in cats.