I could be wrong, but every time I hear this its usually in reference to a homosexual joke, like a man being as straight as a dogs hind legs. Their legs aren't straight so it's a joke.
It varies. Usually right front leg then right hind leg at the same time left front leg then left hind leg.
The hind quarters are upper back leg (thigh) or rump (butt).
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.
It is the muscle on the upper part of a horses hind leg, above the hock.
Dogs have four toes on their front and back paws. However, a little higher up on the leg is the dew claw, which looks a little like a thumb if you have a good imagination. Some dogs are born with dew claws on their front and/or hind legs. If the fifth toe you're talking about sits a little higher up, it is a dew claw. Most dogs born with them have them removed by the breeder when they are puppies or their owners opt to have them removed during spay/neuter surgery.
snake or dog's hind leg
It varies. Usually right front leg then right hind leg at the same time left front leg then left hind leg.
they have there thingy boy dogs left there leg so they do not pee oa there front paws
Tarsal Gland is on the inside of the hind leg and the metatarsal gland is on the outside of the hind leg.
Hind leg, flank, back leg, or rear leg.
They will begin by moving their front leg ahead (either left or right), then the hind leg should move into the same hoof print as the front hoof. Their stride should be a straight line.
Male dogs lift their leg so they can direct their urine to mark their territory. They will typically urinate on the side of a post, tree or whatever is available for them to leave their mark on.
thigh
front and hind
The hind quarters are upper back leg (thigh) or rump (butt).
A rump. They are the hind quaters (near the tail).
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.