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I thought it was the egg WHITE they could have, but not the yolk?
Nah, pretty sure it is the yolk cause they use the white in some immunisation serums and that is what can trigger reactions. Flynn has had whole egg already - I tried him out on it slowly about a month ago and he was fine (not like my mum did with me - shoved a whole raw egg into my bottle and gave it to me when I was 6 months old! It wasn't til she was doing childcare when I was in my 20s when she realised how lucky we were I didn't have a reaction. Man she was guilty about that for weeks LOL!)