You shouldn't just be worried about worms etc from raw food there are lots of other dangerous organisms and mince should always be frozen previous to feeding. Do a search on it before accepting everything read on here to be correct, you cats health is far too important to not read all you can.

Neosporosis Caninum, a parasite that affects the brain, may be found in raw mince. This parasite is obliterated when raw food has been frozen

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