Hello. I am in the process of designing a new type of rodent trap that uses constriction to dispatch it's target. The trouble is getting the pressure right so that the trap squeezes the target to death & not to paste. I don't want to disclose to much about the mechanism itself for fear of patent jumpers but this trap would not only adjust pressure based on the size of the animal caught but would eject the carcass & reset itself after each kill and thus would be effective for as long as there was power to operate the mechanism. I need to know, how much pressure, how hard can you squeeze a mouse without blood/innards squirting out? How about a rat? Ground squirrel?