Besides the cross transmission of internal parasites of unfrozen prey...
Rodent attack is a reality...
Vicious creatures when feeling threatened
Fredric L. Frye, DVM
The following text and photos are from Frye's chapter on pathologic conditions in his Reptiles: An Atlas of Diseases and Treatments (TFH Publications, Neptune City, NJ, 1992, pp. 159, 168)
"Mice, rats, hamsters... all have sharp incisors and are far more intelligent than snakes. Eventually, these animals become hungry and frantic. If given the opportunity to do so, they may attack their erstwhile predators.
.....I have often examined snakes (usually South American boa constrictors) that have been attacked by their intended prey.
The resultant trauma and soft tissue losses have been massive.
In some cases, the periosteum and even bone itself are gnawed away by the rodent.
Some of the most devastating rodent bites have in snakes that had bitten and begun to constrict (or at least hold) their squirming prey, then lost control of the rodent.
The prey then attacked the predator's head or body, eyes, rostrums (including the external nares), and tongues or parts of the lingual sheath.
"Because most snakes are not only sight-feeders, but also employ olefaction in their selection of prey, the loss of the tongue is especially serious.
When the tongue sheath has been damaged, the affected tissues, unfortunately, tend to form dense and proliferative fibrous scar tissue, which often incarcerates the tongue within its sheath."
http://www.anapsid.org/ratbites.html
I have heard some wild tales of people who thought that they were just going to reach in to correct things,
if the rodent started misbehaving, their is probably some first person accounts on how thats worked out for people around here i.e.
remember the time all hell broke loose...mice biting snake, snake biting you, mice now biting you also, the full gamut of interchangible variations of these all too common "tales of woe" , (according to various veterinary sites)...
"Murphys law" I think applies here,
"whatever can go wrong , will, and at the worst possible moment."
A little too much excitement/ commotion for me.
Some people seem to really enjoy watching "the Kill", that was what attracted them to the "hobby".
Makes you wonder what their hobby is???
Different strokes for different folks and all that, but their are too many logical, superior arguments in regards to choosing fresh, humanely dispatched, Frozen/ thawed rodents as an exclusive prey source.
The efficient killing of the probable on board parasites is another shining star reason to serve thawed. imho.