Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

My dog lifts a back leg and it twitches. What's causing this?

Updated On September 23rd, 2025

Pet's info: Dog | Jack Russell Terrier | Female | spayed | 12.5 lbs

My 8 year old jack russell's back leg sometimes 'drifts' in the air when out on walks. It's not like a limp as she doesn't hop or anything, its more like she chooses to walk on 3 legs. Then today I noticed when she was sitting, that same leg had a sort of twitch/ spasm. again not severely and almost not noticeable but it's there.for a jack russell she has never been great at jumping or climbing stairs which i've always found odd but now starting to think perhaps she's never been right?any advice

2 Answers

Most Helpful Answer

Image profile

Answered By Emily, DVM

Veterinarian

Published on June 3rd, 2017

What you're describing sounds like a condition called a luxating patella. This is when the knee cap slides in and out of its groove. This condition overtime can lead to arthritis and potential he predispose a dog to tearing a ligament in the knee. Your veterinarian maybe to do an orthopedic exam and tell you if this is the case.

Vote icon

2Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Ann Dion, DVM

    Veterinarian

    Published on

    Hello. I am sorry that Twiggy is having this issue. The most likely cause would be a luxating patella. This is when the knee-cap will pop in and out. This explains the on and off leg holding up. This can be corrected with surgery if it is bothering her. She could also have arthritis, or a ruptured cruciate ligament. I would recommend having her knee checked by the vet, as there are possible treatment options that would help make her more comfortable. Good luck with Twiggy.

    Vote icon

    1Pet Parents found this answer helpful

See More Answers

Related Questions

Petco Pet Education Center
Health & Wellbeing
Why is my mouse's eye swollen, cloudy, and has pus?
Is your mouse's eye swollen, cloudy, and pussy? Dr. Melanie, a certified vet, discusses severe eye issues like infection or abscess, urging an immediate visit.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
What fish dog food helps dry skin if my dog eats Science Diet?
Is your dog's dry skin a concern? A certified vet offers expert advice on finding the best fish-based dog food alternatives to Science Diet for essential oils.
Updated on February 04, 2026
Petco Pet Education Center
Health & Wellbeing
My pet is breathing hard, not eating, and lethargic. What's wrong?
Is your rat breathing heavily, won't eat, and has no energy? A Licensed Vet Tech explains potential causes like infection and age, urging a vet visit for diagnosis.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet has red spots all over. What's causing them and what to do?
See red spots on your pet? A certified Petco vet discusses common causes like allergies, infections, or mites, guiding you on diagnosis and treatment options.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My small pet is limping and can't bear weight. Should I see a vet?
Is your pet limping and can't bear weight? A certified vet explains why a suspected fracture needs immediate diagnosis and safe pain relief. Get expert guidance.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My dwarf hamster has a shut eye and is limping. What should I do?
Is your dwarf hamster struggling with eye issues or limping? A trusted vet offers expert guidance on symptoms and crucial next steps for comfort and care.
Updated on December 04, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored