My lab mix has soft knots, limps, and leg trembles. What's wrong?

Question

Hello I have a lab mix who in past year or so began developing soft knots under his skin at the top of his back right leg. At first they didn't seem to bother him but over time I've noticed he puts less and less weight on the leg and limps when walking around the house or first stands. He can still run and play but is skiddish when it comes to the back right leg. Sometimes it will begin trembling and he immediately takes all weight off of it. Any ideas as to what is causing this or the severity? Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 5 years and 7 months old | 95 lbs

Rebecca, DVM · Accepted Answer

Hi and thank you for using Petco Pet Education Center, formerly Petcoach. I strongly recommend taking Lardo in for an orthopedic exam. The knots may be related to his limping or it may be something else entirely. Labs can be prone to hip dysplasia and stifle (Knee) problems. Arthritis can also cause worsening lameness. I would suggest an exam to narrow down the cause then the vet may suggest xrays to get a better idea of the problem. Cancer or infection can also affect bones and joints. A full exam will help to narrow down the cause of his pain so an appropriate diagnosis can be made. Please do not give over the counter pain medication, as many are toxic to dogs. I hope Lardo is better soon!

My lab mix has soft knots, limps, and leg trembles. What's wrong?

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