I am not sure about Coca Fiber but I know for sure if you could use it you would have to take the snake out and put him into a feeding bin to prevent a impaction. Now I am confused on why a breeder would let a snake go without giving it a couple meals. Most including me give them 3-5 meals before letting them go! By the way the way you thaw it is put it into warm water for about 10-15 Minutes.

Daniel

Ps: It's ok you don't know this stuff it takes time to learn!