[Tserisa]

Live mice should not be fed to a snake anyway, as they are dangerous to the snake. Many many snakes have been seriously injured, gotten horrible infections, and even died from live food. All rodents should be fed pre-killed in a humane fashion.

There are a few snakes -- especially among some of the less commonly kept species -- that will refuse pre-killed food. However, every effort should be made, for the good of the snake as well as for the good of the animal being fed to the snake, to convert that snake to pre-killed.

Most frozen rodents do not contain chemicals. You can order them directly over the internet to avoid shopping at pet stores that sell animals.