Changing milk for toddler

[Coffeemonster1]

Were going to trial soya milk for our 2 year old due to severe constipation and a sudden onset on eczema , despite lots of fruit and veg and regular movicol.
Are there any issues with changing her cows milk to soya?
She still has an 6oz bottle in the morning and 8oz before under recommendation of dietician due to poor weight gain.

DD2 has soya milk due to dairy intolerance (eczema, diarrhoea). I use Alpro 1+ milk from the supermarket. It is soya milk fortified with vitamins and calcium.

Didn't help? Did it cause any problems switching?

Did it**

DS had a dairy allergy so we used soya after he came off his formula. Initially used Alpro 1+ but discovered it's got a fair bit of added sugar to it, and DS got quite addicted to it. So we swapped to unsweetened soya milk which still has the added calcium and vitamin D.

DD has been dairy free since she was a few months old. We do let her have little dairy occasionally (usually when I give in to pestering for ice cream). The nappies afterwards are quite revolting.