Stop Back Pain Dog That Is 1 Year Old. Her Back Leg Started Hurting After Being Outside What Can I Do To Make The Pain Stop?

Dog that is 1 year old. her back leg started hurting after being outside what can i do to make the pain stop? - stop back pain

I have a border collie mix with a white shepherd. Will be started back leg, injured outside. This is the second time that this has happened, the first time, I gave him aspirin Hartz dog car again and the pain again so far. It does not move most of the time due to pain. I gave her medication but it is a separate work. What is it? Is there another way to stop the pain?