They will do this. Puppies are most likely to bite each other's tails while playing, but adult dogs will also do so. It is usually a play gesture and not meant to be a serious attack. Dogs trained for fighting will also sometimes grab their rival by the tail; this is why the fighting breeds often have docked tails.
Maybe because they have litle dirty or spikey thing that bothers, or maybe they are itching or maybe its a bug or flea
Yes technically wolves have longer tails than dogs. But sometimes dogs can have the same length of tails.
All dogs bite.
No, mosquitos do not bite dogs.
They usually do not bite, but use their tails for defense.
no they dont some dogs have little stubs as tails
all dogs can bite. it depends on how they are trained.
why do dogs bite people
Not all dogs do but certain breads can bite
They can - passing the worms can be irritating, which most dogs would respond to by trying to scratch or bite their tails. More likely, your dog may have another type of parasite such as fleas (which tend to accumulate around the tail head) or lice. If the irritation persists, or your dog's tail starts bleeding or scabbing over, I would suggest taking him to the vet for an examination.
MOST dogs are born with tails, but some breeds have them docked at birth.
Dogs bite humans because they smell fear.
Years ago when yorkies were used to hunt vermin (rats) they docked their tails as the rats would attack sometimes from behind and bite their tails. Also when down in small spaces to kill rats their tails would not get caught on anything.