BTW, a dude put out a video today giving a tip for saving on breeding fees if you're breeding in house. It's too much of a pain in the ass if you only have a few horses, but his plan will save a little money for frequent in-stable breeders.
Basically he's saying to do this:
1) Make a second ZED stable, preferably with Metamask on a different browser
2) Ship studding horse to new stable. Put him up for stud for 7 days, which will net you 56% of the studding fee.
3) Go back to first stable and mate with him
4) Instead of getting 35% BACK for in-stable breeding, you will get 56%
5) Ship studding horse back to first stable in a week when his stud duties are over
Pretty good idea, actually, especially now with the higher fees.