What's the chances

So LO will be 16 months on the 23rd and two days ago I introduced whole milk. He was on 50/50 Similac Alimentum and Similac Advanced (pedi thought he has a Milk protine issue, I'm not to sure because he does fine on all milk based foods) and so I took out the advance and replaced it with whole milk, now he's sick with what seems to be a little stomach bug but everyone else in the house is fine. So what's the chances it's the milk over a bug??? TIA

its going around in my area and only dd got it. maybe same thing for u??

When we switched DD to regular milk she was always sick. I ended up switching her to soy milk & she hasn't had a problem since. Her doctor thinks she's lactose intolerant, so we cut out everything we could that contains milk.

There's bugs going around. Only me & dd got it at our house