Help! Frog spasms!

[Akuma223]

I have a little wild caught wood frog I found in late august of last year and he started having weird spasms. I scooped him out of his hole to feed him and he started to writhe around. He clawed at his face a bit, screamed, and his legs would straighten out completely suddenly. He cant right himself and he is siting still now but listing to the side. My friends wood frog that I gave her also has these problems except far less. His legs would straighten and he couldn't seem to bend them, he didn't look like he was in pain. I thought it was a freak incident but now my little one is having the problem. My other wood frog seems fine but I will have them in quarantine from the others. I pick him up and he just moves his legs erratically. It almost looks like he had a stroke!

They eat crickets with an occasional earthworm. They have a UV light. Their substrate is Eco-earth covered with moss. They have a water bowl they can submerge in a flat rock, and branches to sit and climb on. The two wood frogs are housed in a ten gallon with three WC toads, and a adult WC grey tree frog. All the toads and wood and tree frogs have been together for months without problem as they are all around the same size. Please help me figure this out. I love my little wood frogs to death and need to now what I might be doing wrong or what is wrong with them.