Hi, I am Dr. Peter and would like to help.
1- How long has this been going on?
2- Is she showing signs of pain?
3- Do you know if she got hurt?
4- Any other symptoms?
1- How long has this been going on? About 2 days
2- Is she showing signs of pain? No
3- Do you know if she got hurt? I don't think so.
4- Any other symptoms? No
She is a very active dog. She is constantly chasing after a ball or going on a walk or run with one of the family members
If she is reluctant to jump on the couch or bed, she must have hurt something. Possible a muscle, tendon, ligament or even hurt her back or hips. I would advise you to rest her for a couple of days, no jumping or running. Give her Buffered Aspirin 5-10 mg per pound body weight every 12 hours with some food and see how she does.
If you have additional questions I will be glad to answer them.