That is kind of funny. When I lived in longwood fl. that rats and mice I raised that ironically often feed my baby burms among other things, had an exceptionally high cancer rate. We used to joke about the mouse cancer research thing because we did nothing to them except feed and water them and of course feed them off.
When I moved to paisley my cancer rate in my rodent colonies dropped 90%.
My theory is it must have been the water as nothing else changed and they do have water issues in the neighboring town of Lake Mary.
I guess I could have treated them with python blood. go figure.