They should only be getting milk as one of their five daily feeds at 4 weeks. They need plenmty protein and nutrients at that age. I use cobbydog from 3 weeks (weaning) to 9 months, then they can go on adult food, and goats milk is better than cows milk. Other than that just water is all they need to drink. They don't need porridge, custard, scrambled eggs, weetabix or any of the stuff we used to feed puppies.