hi
there are a couple of good products on the market
there is hills science plan and also do prescibed food for different ailments
also there is NEUTRO kitten and all other cats ages which is good for health/bones etc with no additives.
just a question as you are on the raw diet... has he been wormed recently? as this also could be a bearing factor?
is he lively and wanting to play? or just sleeping all the time?
can you see his 3rd eyelid all the time? this goes from right to left and is a greyish white. if so this could indicate being a bit under the weather.
does he have constant loose stools?what did you used to feed him on?
fg