When I first stared to feed Raw, I'd take out 4 medalions the night before and put them into a baggie and into the fridge.
Roxy inhales anything, frozen or thawed. But TJ was having a hard time with it being thawed. He has adult teeth that never formed, upper and low - along the side of his mouth, so I think the thawed food just kept getting stuck on the roof of his mouth. Eventually, he didn't want to eat it
That's when I went to feeding it really on the frozen side, plus I have heard that when it is sorta frozen they really have to do some chewing, thus helping clean teeth