By looking at the list at the kibble link above and seeing which of those are actually available locally for me to buy, I ended up buying two to mix. (That is supposed to be a good idea in case there is ever a recall on one or the store is out. If you are still able to get one, at least your hedgehog won't have to suddenly switch foods.)
I use a mix of Pure Balance chicken & brown rice formula and Wellness Core grain free deboned chicken, turkey. The Wellness is a little high in protein but since mine is still young (like yours), they can handle the higher protein.
I'll switch from the Wellness as he grows older.
Oh... and I should mention in case you weren't aware that it is a good idea to switch them to new foods gradually by mixing the old food with the new to give their tummies time to adjust.
here with my new Mecki-- born 2/12/19