Hi stranger! Signing up for MypetMD is easy, free and puts the most relevant content at your fingertips.

Get Instant Access To

  • 24/7 alerts for pet-related recalls

  • Your own library of articles, blogs, and favorite pet names

  • Tools designed to keep your pets happy and healthy



or Connect with Facebook

By joining petMD, you agree to the Privacy Policy.


Q. Dog favors rear leg & limping for approx 2 months. Unable to junp onto bed & "toe touches". Tightness in ACL muscle & leg. On rimadyl per vetenarian.

Answered By
DR. CHRISTIE LONG, D.V.M., C.V.A.

A. The ACL is a ligament, not a muscle, and it's very common for dogs to tear it, either fully or partially. A tear to this ligament produces chronic lameness that sometimes improves over time, but not addressing the tear usually results in severe arthritis and chronic lameness. If your vet hasn't assessed his knee joint with x-rays and a thorough examination, that should be done. Other possibilities include hip problems, low back problems, or fractures to any of the small bones in the feet. A good exam can localize the pain, and then you can go from there to figure exactly what's wrong and how to treat it.


DISCLAIMER: The answers in Ask petMD are meant to provide entertainment and education. They should not take the place of a vet visit. Please see our Terms and Conditions.

CAN'T FIND WHAT YOU'RE LOOKING FOR?

Ask an expert about your unique situation now FOR FREE!

IMPORTANT: The opinions expressed in Ask petMD content area are solely those of the User, who may or may not have medical or scientific training. Our Ask petMD experts include veterinarians, vet techs, veterinary students, pet trainers, pet behaviorists and pet nutritionists. These opinions do not represent the opinions of petMD. User-generated content areas are not reviewed by a petMD veterinarian or any member of the petMD editorial staff for accuracy, balance, objectivity, timeliness, or any other reason except for compliance with our Terms and Conditions. petMD does not endorse any specific product, service, or treatment. Do not consider petMD user-generated content as medical advice. Never delay or disregard seeking professional medical advice from your veterinarian or other qualified healthcare provider because of something you have read on petMD.