For my one that has always been on f/t, I do thaw and warm them up. Hot water, let'em soak till the water cools, then do it again till it's the right temp, that way I KNOW it's all the way thawed. Never had an issue. I can't say how my friend had been doing it, thats why I'm wondering about it being half digested/half regurg. I'm planning on scenting it w/ bedding from my daughters pet rodents. See if she'll like it better, she'd always been on live/stunned till the place locally got shut down.