Stiffness of the dog's limbs and constant panting may be caused by parasitic infection, calcium deficiency, etc. Pay attention to the hygiene of the dog's living environment, clean and disinfect frequently to avoid bacterial growth. In terms of diet, the owner should strengthen the nutritional supplement of the dog. You can feed the dog some goat milk powder, beef, pork, chicken and other foods to enhance the calcium of the dog. Take the dog to bask in the sun more. If it does not get better, you need to take the dog to the pet hospital immediately. Carry out examination and treatment.