surgery time!
maybe it has an injury or a sore or it could be infected
A dog will not eat its own leg. Dogs will sometimes lick or gnaw at their legs if they are itchy, wounded, or infected.
BITE THE DOGS LEG OFF
There are relatively few cases of dogs and cats becoming infected with WNV.
go to the vet
A bug bit him!
Yes I think it is defiantly infected, you should get him to the vet ASAP, and he needs to be taken care of immediately.
No, infected teeth cannot cause leg pain. However, it is possible for an infected tooth to cause sepsis, or whole body infection, that would not only cause pain in distant sites, but is life threatening.
No I don't think you can because the flip flop is very light and not hard so when you hit it against the dogs leg it will not hurt. The dogs leg is hard and sturdy.
Dogs do not get infected with streptococcus pyogenes.
Im sure you mean why do boy dogs lift a leg and girl dogs don't. Well, the answer would be because if boy dogs tried to "go" without lifting their leg up they would just end up peeing on their leg. and somehow they know that they dont want that.
Dogs get rabies from being bitten by another animal that is already infected.