If you know how to do it,you can just...add a lot of horses to foals pasture with this little glitch.

1) make sure you have 1 spot left in the pastures

2) open foal pastures page in as many tabs as you need

3) now choose a horse to put in the foals pasture (make sure to not select the same horse twice)

4) go from tab to tab and click on "leave for XXXXX HRC" and bam! you can shove all foals you want in there. Right now I have 49 foals in my pastures.

EDIT: only downside is...you may not be able to see all horses you have put in there.You will still see only 40 horses. However,if you take one foal out from the pasture,the foals that are not visible appear in the empty spot.