Ok I realize that some forms it would be impossible to bind..like a snake.

But I had a battle where I had a bobcat knocked out. I was able to bind it's legs fine but when I tried to bind its front paws it said it didnt have hands. I was thinking that binding a four legged creature should be possible, especially since after that bobcat woke up he was able to "reach over to his legs and remove the bound legs tie"