Since morning it won’t run or jump, cries when picked up, now lies down, breathing faster.

Rapid breathing in a dog may be caused by heart disease, respiratory tract disease, or lung abnormalities. It is best to take the dog to a hospital for examination and treatment to avoid the condition worsening and delaying care.

Also, rapid breathing can occur after strenuous exercise, in hot weather, or when the dog is excited. If the dog has a heart condition, avoid intense exercise to prevent accidents.