by Harpmaker » Sun Sep 13, 2015 2:31 am
First off, pellets aren't necessarily best. Most vets do recommend them, because they are as easy as seeds and much better than nothing but seeds. However, pellets are drier than anything birds eat in the wild, and you can't get a good analysis of what is in them. I feed my birds "gloop"-cooked whole grains, white beans, and vegetables; and "chop" a mixture of raw and cooked produce. There are several recipes on this site that you can search for. This is served in the morning, and around an hour before sunset I remove it and put in a good seed mix for dinner. I remove the seed mix when I put the bird to bed at sunset.
But in any case, babies need soft food for a while. Even if your breeder believes the bird to be weaned, it is normal for very young birds to regress on their weaning as a reaction to the stress of a new home. Human baby food will work. Only use the vegetables and fruit.
If you want to switch from just seeds to something else(recommended), the general method is to mix the seeds they are used to with what you want them to eat instead, whether pellets or gloop. Gradually reduce the amount of seed until the bird is eating only the new food.
We have other members that can give you more details, but this should get you started.