My 12 month old has made the switch to cows milk. This morning he had a bottle which I'd left and not had time to wash up yet anyway. Put him in his highchair to make him a snack and before I had a chance he'd grabbed the milk and started drinking it. It's full fat cows milk and been out probably around 2 hours. He probably only drank a mouthful. I've smelt it and it smells fine although I do currently have sinusitis so my senses are impaired anyway. He's literally just getting over a stomach bug to make matters worse!! Should I be worried!? Thanks