But the problem with you, is you haven't given any scientific information as to why feeding live is better for your animals.
I was in the crowd that believed f/t should be exclusive until I had a case of egg binding and started looking for ways to decrease the liklihood of it happening again.
While I don't know of a way to quantitatively measure a snakes strength, there is a noticeable strength difference between my snakes that eat live only and my snakes that eat f/t. If you know of a way to scientifically measure muscle tone without killing the snake and dissecting it, I'm all ears.
Yes - a larger tub can increase their muscle tone as well, but it is not mutually exclusive. Wild snakes are stronger than captive, so it seems rather clear that no husbandry method is going to max out the muscle tone a captive snake can achieve, there is room for improvement.
The incidents of a mouse (note the word mouse) seriously harming a snake that wants to feed upon it is extremely rare, many keepers of large volumes of snakes have never had an incident.
Larger tubs, handling, etc. can all contribute to increased muscle tone - feeding live should not be done as a substitute for them, but I believe it can and does contribute to increased muscle tone above and beyond what can be achieved by those methods alone, based upon the strength of my live feeders in my collection vs f/t feeders.
Snakes I have that only eat live:
Male Cal King, WC as adult in 2000 - strongest king I have (though not as strong as when collected)
Female Cal King, history unknown but probably CB
Female Mexican Black King, captive bred
Female Pac Gopher, WC as adult in 2007 - she sometimes takes f/t when dangled, but more often than not, leaves them after constriction uneaten.
WC Pac Gopher, WC as neonate in 2008 - he took f/t initially, however, after a few meals he regurged one and never took a f/t again. He pounds live though. I do keep trying to entice him to take f/t, rats are a more appropriately sized meal for a large gopher, so I want him switched before he hits the 5 or 6 foot size.
Hypo het Lavender Corn - received as a known non feeder, accepts live, refused f/t. I have two of her siblings which also started as live only feeders but made the switch. The one that refuses f/t every time I try is noticeably stronger than her siblings.
I'm sure that does not qualify as "scientific" data - but really, I'm interested in what is best for my snakes. So given the lack of ability to collect what would pass scientific scrutiny, my "non scientific" observations are best I have to go on - along with my years of problem free experience feeding live exclusively.
The reader of this thread can read the positions presented and decide what they feel is best for their own husbandry, and for any reader who does not breed, I highly highly recommend f/t. If you do breed, I highly highly recommend that you try to get your female to constrict f/t before resorting to live. If they get lazy and figure out f/t is already dead and does not need constriction, then it very well may save your snakes life during egg laying to feed live
mice under close supervision. That's all I have to say.
For those reading this thread - please note that those calling for "scientific" evidence have provided no scientific evidence of their own that their methods provide the muscle tone to reduce egg binding effectively enough that allowing constriction is of no benefit to muscle tone.