She probably was talking about being out of previcox, for joint pain. I don't know what joint pain has to do with twitching. All dogs twitch their legs in their sleep, probably. Basically there's nothing to be done but take it to the vet. I have no idea why she thinks a human syndrome like restless legs would apply to dogs. I agree, dani, this poster is one big cluster mess. We'll probably never know what she was talking about, even if she does come back to explain, as she is pretty indecipherable.
...I am now at the stage of wine-surfing COTH
There is a kind of epilepsy that involves leg twitching as the primary symptom. It progresses from there. Usually at night. My Boston has it. Call UC Berckley vet school or a Neuro specialist. The regular vets miss it.