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A veterinarian explains four possible causes of sudden weakness in your dog’s back legs, and what you must do. When your dog’s hind legs suddenly go weak, there could be any number of causes, says veterinarian Dr. Jules Benson, BVSc, and VP of Veterinary Services at Petplan pet insurance, whom I interviewed just for this article.


Causes of Back Leg Weakness in Dogs The reasons behind a weakness in your dog’s back legs can vary. While obvious trauma can weaken muscles and tissues, and age can contribute to the degeneration of muscles and joints, other conditions can wreak havoc on the spinal cord, nerves, and hormones.


Hind Leg Weakness: When Your Dog’s Back Legs Give Out. Are your dog’s back legs weak? Here’s what to expect when you see the vet — plus some possible reasons for a dog’s back legs suddenly not working.


Sudden hind leg weakness in dogs. Dog hind leg weakness from some of the above mentioned causes can be treated effectively. However, the success of treatment often depends on how soon it’s started – especially in the case of sudden hind leg weakness. A spinal injury usually causes sudden dog hind leg weakness, which is also severe and painful.


A second common reason for back leg weakness is injury to the spinal cord or back. Spinal cord injuries, often as a result of trauma, disc rupture or stroke, account for 2 percent of all dog veterinarian visits. If the spinal cord or back is damaged, bruised or inflamed, the back legs may become weak or unstable.


What Causes a Dog’s Hind Legs to Grow Weak? There are several ailments that can cause a dog’s hind legs to lose its power and normal abilities. What makes the condition truly frightening is that the condition could manifest itself in a very sudden manner, seemingly without warning.


Senior dog sudden hind leg weakness This is a discussion on Senior dog sudden hind leg weakness within the Dog Health forums, part of the Keeping and Caring for Dogs category; Hello, I have an 11 year old 100lb lab/rot mix. He had knee surgery about 4 years ago, so he's been slower (not terribly so) ...


A sudden loss of coordination or movement of the hind legs in your pet signals a need for emergency care. The most common cause of these signs is a herniated disc in the spine (often called intervertebral disc disease or IVDD). If your dog is affected by IVDD, he may start showing pain or arching of the back.


However, when there is sudden weakness of the back legs and your dog still is unable to move, this is a symptom that should be evaluated and treated immediately by your veterinarian. Following are some possible causes for a dog’s back legs suddenly giving out by veterinarian Dr. Joanne Fernandez-Lopez.


Dog Weakness and Lethargy: Common Causes and Treatments. A few of the more common causes of weakness or lethargy in dogs include the following: Infection. Any kind of infection -- including serious ones such as parvovirus, distemper, kennel cough, leptospirosis, and heartworm disease -- can make your dog lethargic.