Cows milk intro causing poorly rum

[helgaw99]

Hi all,
Started trying to move my 12m DS from formula to cows milk. Doing it very gradually ie 150 mls formula and 30 mls cows milk for a few days, then putting cows milk on cereal. But DS seems to have not reacted brilliantly- poo gone very loose, lots more pooing than normal and radioactive bum.
Is it the cows milk? Should I stop or will it even out as his gut gets used to it?
He can't drink formula forever and is fine with all other dairy.
Anyone got experience of this?
Thanks
H

Hasn't he had cow's milk on cereal before helgaw? They usually have it from 6 months.

How long has it being going? Do you think it may just be coincidence?

As for the sore bum, have you tried Metanium?

He has had some cows milk before but not a lot.

Bum seems to have cleared up and a tooth has popped through, so maybe that was it!

Sounds much more likely. Hope his bum gets better soon too