Didn't know about the recipes, but I found that when you play as breeder, farming cash and upgrade points by selling all the kids you have with your slaves (especially the Noble grade, beautiful slaves) gets you cash and upgrade points so much faster and easier (since you're not aiming for any particular species). In all my breeder games, I've only done the slave guild quests to get reputation with the city or to get some quick cash when I spent all my money on the farm.