Yes, I think they will be okay. If you have trouble with lactose, go for the lactose reduced ones. Otherwise, if you don't have milk allergy, there is no reason why milk should upset you. If you are flaring, probably anything would upset your tummy to some extent, so go for it and give it a try.
Important notice: Try to drink it very slowly or even add water to it, otherwise it leads to diarrhoea.
Even a high fat content that many people are concerned about in "normal" food would not be a problem in the pre-digested enteral drinks, certain omega-formulas are even very anti-inflammatory (e.g. ModulenIBD).
I would be more concerned about the high sugar content, my nutritionist is of that opinion. High dairy content and high fat content, as well as high protein content is very beneficial for IBD, I learned.
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