Hey,
do you sort your horses by skills or age maybe? If you train them, their skills will increase, which will change the order of the horses. It's the same with the age if you just click on them. That's why I usually sort them by Date of birth. (this and because it was the default, if I remember correctly ^^ )

Kind regards,
Mirana

I have this problem all the time, I always click a search to only see horses that are not bedded, so when I click next it prevents it going to ones Ive already done.

Thank you both, I was searching by skills, I like to save the more exciting horses until last

Changing to DOB has helped

Thank you very much