Can sheep be fed on grains? It is just that halal has all sorts of religious restrictions which are no use to an RPDer, such as removing all the blood etc., but, afaik, there are no halal commands for certain animals to be grassfed or antibiotic-free etc. I once went around London asking for grassfed halal meat, they looked at me like I was a moron.
Yes, sheep can be fed on grains.
Muslims, at least in California, are not robots of their scriptures. They are regular people with customs and habits, like all people in all cultures.
The typical consumer at the ranch I go to expects grassfed because he knows that the meat is no good from a grain fed lamb. There's a taste difference, plus he is close enough to the slaughter process to have seen grass vs grain innards. At the ranch, being it's the dry summer season, they expect to see mountains of hay and no bags of grain. Anyway, that's what I get told when I ask, even though I probably look like a moron.
Really knowing your meat is pretty typical of a nose-to-tail consumer. I've read that the religious custom of offering the blood to a god was practiced in the Middle East by the early tribal religions, long before it became incorporated in the Hebrew law, then the Islamic law. Oftentimes, a food sacrifice was eaten by the priest, so maybe the custom started when some blood-loving priest demanded all the fresh blood be offered on his god's altar. Sluuurp!