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Why is my puppy limping on 3 legs with clear x-rays? I need help!

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 1 year old | 32 lbs

My 1 year old whoodle puppy is walking on 3 legs. She has seen the vet twice we just had an X-ray on 12/27 and the results showed nothing. Vet treating her with antibiotics for a “maybe” bone infection. It’s been a week and nothing has changed. I’m at my wits end. Her hips leg have been examined and X-ray no issues. HELP!

1 Answer

Most Helpful Answer

Ana M, DVM

Answered By Ana M, DVM

Veterinarian

Published on January 1st, 2019

Thank you for submitting your question regarding Lucy. I am sorry to hear about her recent troubles. How frustrating! There is a muscle known as the iliospoas that wraps around from the lower back to the pelvis. If this muscle is strained, it is extremely painful. This can be detected on a physical exam, but would not show up on an x-ray. Other problems can be related the spine itself such as disc disease. The most common cause of rear limb lameness is a torn cruciate ligament in the knee. Has she had stifle x-rays? More rare conditions are autoimmune joint disease or a tick borne infection. Both of these are typically accompanied by a fever. You may consider a referral to see an orthopedic specialist if you are having trouble reaching a diagnosis. I hope this information helps!
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