What do clouds do on Howrse?

If you give a howrse a cloud, its age will decrese four months and you will get two aging points. If a horse if in gestation, it will not go two months back in gestation (i.e., if the mare is six months into gestation, and you give her a cloud, she will not go to two months into gestation, but stay at six. She will just become 2 months younger.)