The alfalfa crumble is essentially an alfalfa pellet that has been broken (crumbled) into smaller pieces. As a carrier, will depend on the form(s) of the supplements, i.e. pellet, powder, liquids etc. Usually a texture feed works better as an all-purpose carrier. If you are just thinking about a small amount and just want a carrier you may also want to consider Integrity Lite no molasses which is a balanced formula that does not contain grains, no alfalfa, is high fiber (20%), first two ingredients are beet pulp and soy hulls and balanced for required vitamins and minerals.