It could be like a snowball effect , he had all of those milk products individually and then they all added up to be too much for his little system
i don’t really understand intolerances too well but my dd has the milk protein allergy and if they work similarly , my understanding is that the quantity of the allergen(in your case intolerance) determines how big the reaction is,
so if my dd were to lick a dairy yoghurt , her reaction would be less noticeable than if she were to eat a whole spoon of it ,
so maybe baby was kind of ok with the cheese sandwich but the yoghurt was just too much!
and he’s 1 so he can’t say , mum that cheese sandwich actually made my tummy hurt abit !
So maybe he was reacting to the the dairy but just couldn’t express it ,
I know it’s hard when they have reactions that you can’t see , it just makes it more complicated
the mucus in the poo definitely means he’s not handling the dairy well ,
So if it was me I would give the dairy foods a break for awhile and see if there is an improvement
you could ask a nutritionist for more advice on what to do next in terms if reintroducing it , it would be a shame to deprive him of some foods if he can actually tolerate them.
my dds allergic reactions are different depending on what she comes into contact with,
dairy chocolate, raw milk and yoghurt produce the worst most noticeable reactions
but for some reason she has had very well done cheese on a pizza and tolerated it before ,
she’s also tolerated milk baked in to cakes
the doctor told me that cooking the allergen changes the structure of the milk protein , which means the body doesn’t recognise it as an allergen any more
they usually do those taste tests in hospital , depending on the severity of the allergy
maybe they can do some similar tests for your lo
you can give him multivitamins with calcium and vit d,
Or you can try rice milk and oat milk they are both high in calcium , on the same level as cows milk
there’s lots of vegan alternatives you can try, like oat yoghurt and coconut yoghurt, so he won’t be missing out too much x