Hello, I’m new here. I appreciate any help and advice 
I only got my bunny around 1 month minus 3 days so I’m very new at bunny related matter
I have recently made a visit to vet and the vet in my city advised me to change my bunny diet to oxbow natural science adult rabbit food currently he’s eating oxbow essentials young rabbit food but when he was with breeder, he’s eating local type of pellets which is not that great for pet bunny, my bunny still loves this pellet though, gave him sometimes for treats only but not in his foodbowl because he will only eat this pellet not the oxbow one (picky eater)
My question is when i got the natural science one i read the description it is only for rabbit with 1 year+ age and my bunny is only 10 months of age (DOB: 09/03/15) fyi, my bunny really loves alfafa hay as well (he prefers to eat all that non healthy stuffs) and his pee got white residue already so I want to switch his diet to timothy based (adult food)..
Is it okay for bunny under one year to eat the adult rabbit food? I tried giving it to him once mixed with the young rabbit pellet he won’t eat his pellet at all (super picky eater) but afterwards haven’t gave him anymore of the adult pellet, just sticking to the young one for now.
Another information: where I live in (Indonesia) mostly they sell oxbow products only and in my city there is only 1 vet specialized in rabbit so I can’t ask another vet for opinion. Really appreciate all the help given in this page
thank you very much.