I am glad this came up as this very same thing happened to me yesterday. I feed frozen but some of the frozen I have received have had blood on there ears or nose which leads me to believe they suffered . Totally not the reason I would be doing f/t ..I think in time I will learn to co2 them on my own so that I can be certain . Until then I am hoping to find a small breeder who does this that I trust to be a honest and humane person . Plus our reptile store is pretty gross anyways . I would rather breed and euthanize my own so I know how they were treated.