The hind legs of a full-moon puppy may be caused by calcium deficiency. You can properly supplement nutrition and calcium to the dog, and then observe it for a period of time to see if there is improvement. If there is no improvement, it is best to send the puppy to a pet. Check it out at the hospital to avoid delaying your condition.
Tips:
Puppies are prone to calcium deficiency during their development period, so you should pay attention to supplementing calcium for your dog, and avoid strenuous exercise. Avoid injury.