With mice/rats i just hold the prey by the tail with tweezers or tongs, and position the prey so the snake can bite the prey in the appropriate place as best they can and then just keep the head from moving near the snake to bite. ( usually mine strike well enough that their coils restrict the movement of the head and prevent this without my help, but its not a 100% thing)
Sorry, *editing* If they do not have a decent enough hold on an animal in that, the head is able to move freely before they are killed, i use the tweezers/tongs to prevent the head from moving.
with other prey such as hamsters id just hold them by the scruff of the neck. ( i do not make it a habit to feed my animals different prey items though, as hamsters are more expensive for one, and alot less easier to maneuver as ive described mice can be)
*another edit. im tired, forgive me here.![]()
I do not see any fear of using tweezers and the like when feeding my animals, that is not to say yours would not be, just that i have not experienced it.
Its also a more lengthy process to live feeding, but one i am comfortable with using.