What it is
Episodes are set off by a particular mix: hard, exciting exercise kept up for several minutes, the kind of non-stop fetching or hunting that keyed-up dogs adore. Under that load something falters in the way the nerves pass signals to the muscles, and the hind legs stop working properly while the dog's mind stays clear and its eagerness does not dim. The dog recovers after a rest, but every episode needs to be taken seriously.
The disorder is inherited, and signs appear in young adult dogs once they start hard training or work. Heat, humidity and high excitement make an episode more likely.
Living with it means learning your dog's limits. A calm walk or a steady jog is a very different load from frantic, endless retrieves, so short play sessions with breaks, and stopping at the first wobble, keep the fun going. On hot days, keep the excitement low.
Signs you may notice
- Wobbles after intense play
- Hind legs cross or drag
- Lies down but still wants to run
- Stays conscious throughout
- Recovers after a rest
After a few minutes of non-stop running or play the dog starts to wobble, its hind legs become clumsy, cross or drag, and then it lies down even though it still wants to run. Throughout the episode the dog stays conscious and alert.
When to see a vet
If your dog collapses or its legs give way during exercise, a vet is needed immediately. Even if it recovers, have it checked so the cause can be found.
This is general information, not veterinary advice. For your own dog's health, tests and treatment, see a vet.