Hi Moops and Welcome
JJ is right, it sounds as if you have restless leg syndrome. I have restless legs as well. Especially if I over do things I've noticed. My legs will jump and twitch. I have hubby massage them for me each night and that seems to help. I need to add some mag to my diet as well and have been lazy about ordering some.
JJ ~ LOL! My little fur kids legs legs would go all night as well. I always imagined that they were chasing bugs or birds on the fence line