This may be caused by the dog exercising for too long, or caused by the dog's calcium deficiency. Injury to the dog's legs can also cause this situation. It is best for parents to check the dog's hind legs in time to see if Does he have any fractures or trauma? If you can't find the cause after ruling out these, it's best to take him to the hospital for a checkup.

Tip:

Some dog breeds are born with problems with their hind limbs, such as German shepherds, golden retrievers, and Teddy dogs. Their hind limbs can easily form horoscopes. When parents raise them, Pay attention to maintenance.