A way to stunt the children, as of the parent’s rights.

….. “Public authorities are under a general duty under the Equality Act 2010 to avoid discrimination by limiting the Nursery Milk Scheme only to cow’s milk, the Department of Health is failing in that duty.” ….
……. “vegan children are unfairly treated”, lamenting that parents have to buy their own “plant milk” for them, “something that is not always possible for low-income families and causes a great deal of inconvenience to families who should be entitled to free milk alternatives”. ……
……. Vegan activists have called for their dietary choice to be deemed a protected characteristic — such as sexuality, gender, age, or race — and discrimination against it an offence, with three philosophers speaking to Quartz last year saying it should be given the same legally-protected status as religion.

Utilitarian philosopher at Princeton University Peter Singer said veganism was “a sounder belief than any of the religions” which “rests on a strong moral foundation. It’s clearly a deep belief, it affects your life and the way you behave and outlook on the world, and I think should count as philosophical belief.” ….. https://www.breitbart.com/europe/2019/09/28/vegans-threaten-sue-discriminatory-policy-serving-milk-nursery-tots/

So long as a vegan does not complain about halal killing, as also shown in that link, islam trumps vegans.