This mod lifts the animal husbandry limit from 15 to 64 so now you can have up to 64 animal husbandries per Savegame in SP and Mulitplayer.
Note though that the limit wasn't arbitrary and there are some performance considerations when having that many animals.
I recommend to only use all 64 slots if your PC (and the PC's of your other players in case of a server) can handle it. Its also recommended to not place all the husbandries next to each other, instead have them scattered around the map.