It's a genetic fault in the neuromuscular transmitters to the hind legs. If the dog gets overtired, overheated, and overexcited, their hind end quits working. But you know it's not heat stroke because in 15 minutes with rest and hydration they're absolutely fine, as though nothing had happened.
It's the scariest thing -- Ruby has had one episode, during intensive training on a very hot day. I thought she had stepped in a hole and broken her back. While some dogs are severely affected and some have died during an episode, Ruby seems to be only mildly affected, and with Doggie Gatorade and cooling mats, fans, etc. she has never had another attack.
No kidding? I wonder if that is what my little Rex has. He can literally come to a stop and not move for about 5 minutes.
I have been saying for years he is a dork and lazy. I just pick him up.
Does it affect cockers or is my little guy just a little lazy?