I think I figured it out started a new save for a test map, and placed downed the new animals without the animal package vanilla edition, and the enhanced animal system. after fast forwarding a few months I saw baby animals.
Rabbits: clover or hay pellets for first category, lettuce, apples, cabbage for the second one.
Geese, ducks, chickens: grains (wheat, barley, sorghum, millet, rye, spelt, triticale etc.) and root cuts: sugarbeet cut, potato cut, taro cut, carrot cut etc. (you can buy them from one of the buying station or shredd them like sugarbeet cut)