
chocolate is poisonious so your child should be taught not to give him anything.
As for feeding amounts you should give what it says on the bag and as for dry or meaty then its up to you. personally i prefer to give my dogs dried food because it is easier and comes out the other end better but i do give it to them with water or diluted milk
and as for the bones. YES buchers raw bones are great for dogs (tho they do smell abit) but i wouldnt get them for him untill he is about a year and his teeth are stronger