He proably has injured the leg he isn't using. you should check to see if the leg is tender, or if he has any thorns or splinters in his paw.
You have to have three legs and a spare dog
The Dog is fine
A dog trots by means of propulsion with its four legs. Usually dogs walk with three legs on the ground at a time; dogs have two legs on the ground to save time while leaping.
Shake hands.
dog
Can you breed a dog with three legs. I guess that would depend on what leg is missing and if the dog is male or female.
A corgi is a breed of dog, so will move using four legs.
Not as a breed of dog, they don't. I remember seeing a three legged dog some years ago. It had had a leg amputated, and had no trouble moving about on three legs. So, three legged dogs exist only in the capacity of an amputee.
Take her to the vet!
There are 4 legs on 1 dog normally
One, the spider has an exoskeleton, the fish has scales. Two, the spider has 8 legs, the fish has none. Three, the spider can't breathe underwater, the fish can.
I would think there is a problem here. May not be serious, but when they walk on three legs, they are feeling pain, or at least some discomfort using the leg. Watch the dog for a few days see if it comes around, may have twisted it, or something while playing and jumping around which terriers seem to do. If the dog continues to raise the leg, then bring him in for on x-ray to check for any breaks.