Horses was one thing Hayo was going to add for, but keep getting pushed back by other things, don't know when he will get to them, but one of the updates on here in the future will eventually have them in it, and feel free to bookmark this link for a list of recipes without having to manually find it by trial and error: https://docs.google.com/spreadsheets/d/1kk1nVwdcqxsqkysRpLgMoRE0wKDOmMXYfxKpDsBl...
It is the 6th one on the list for how to craft it.
If you mean the love potion, you can give it to the shopkeeper and hayden iirc, but using it on them will drop their relationship a certain amount each time that happens, and i think Hayo is a male, but i don't really know about it, Hayo next focus seem to be the Rats in the basement in the tavern based on that pic on twitter or patreon, but it might also include other things, like making the amount of time you craft a recipe before it is added to the mastered list for each of them lower.
