Okay.. so if your like me.. and are wanting to increase your livestock by A LOT then you let your male in the pen and leave him there. However.. unless your watching you cannot tell which animal is with calf/piglet/lamb and it gets annoying.. Then I remembered that I read a book with sheep breeders in it.. Well, they would tie chalk bags to the underside of the ram/cow/boar, so if the next they found chalk on the animal then it would most likely have a baby.
I was thinking it would quite simple for jorb to go in and add a red or blue spot to show on the back of pregnant animals.