Took two small packs of beef mince out freezer this morning, it wasn't totally defrosted, whilst I was browning it with some onions I noticed it smelledd weird! I can't describe it but it didn't smell like it usually did, after I drained it the smell went away? Got my partner to sniff it and eat a bit and he said it smelled and tasted fine. I'm making a hot pot, I'm worrying the mince is spoiled. Any advice? Hotpot bubbling away in the oven but I'm worried the mince isn't good and we will get sick.