i'm very experienced with the milk diet and i'm not bothered by a bit of mucus, that is more of an issue from eating a lot of cheese or UHT or other processed, i mean pasteurised milk and medium age goat cheese and yogurt

milk also provides a lot of its own natural fibre because the intestines polymerise excess lactose into fiber, it is surprising how regular you get on a milk diet

with what i find with my reaction to foods cutting out dairy for this means no eating at all, and that's not what i have in mind, i think it helps to feed the beasts a little while you douse them with poison, to make sure you catch as much of their lifecycle as possible and prevent the survival of eggs/spores, very often eggs and spores are not vulnerable to the poisons thus the time you have to keep taking the medicine