Yeah, biggest difference is the food. I sift chick crumble with a strainer and feed them the very small granules that result for the first week, then throw their regular crumble in to a food processor to chop it a bit finer for the next month. You could switch them larger before a month is out, but I spoil the little brats and work them up to the full size slowly.. otherwise they tend to pick around the bigger crumbles to get at the powdery nonsense and you can end up with a "full bowl, empty crop" kind of situation and be none the wiser.
Have a roof covering of some kind on your brooder. They get flighted very fast in comparison to other chickens, and are very good at it! They're so light that the those primaries come in they can get a surprising amount of lift.
There are no further changes until they're laying age. If you are keeping roosters, please make sure they don't get layer feed! Serama are very small, and as a result, have tiny kidneys. The excess calcium in layer feed is a huge strain on them. It really isn't a mystery why it seems to always be serama roosters that suddenly up and die. I feed "pullet grower" which is adult chicken nutrition without added calcium for actively laying hens. Be very careful about dosing both males and females with anything as well. They are smaller than most bantams and you should really consult a poultry vet about dosages for your particular bird based on weight. Don't strain those teeny kidneys! This isn't to say serama are delicate flowers who will crumble, they just need a little thought to thrive where most chicken keepers don't pay any attention.
BUT emotionally>>>
e 
I AM IN LOVE, 
and they will become pests, beggars and DEMAND all your time for loving on them 
