So I'm not sure if this is a bog or what, but I clicked all of the boxes below:

Tobiano

Splash White

Rabicano

Sabino

Frame overo

Appaloosa

And I chose the breed filter PON and searched. A bunch of horses came up, all PON obviously. Then I changed it to "Any" breed and searched. This time it just said "No horses were found." I tried all the other breeds just to be sure and only ISH, SH, and PON had any horses. Then I clicked "Any" for breeds again and "No horses were found" came back up. Again, not sure if this is a bug or what, just wanted to put it out there.

I've noticed this as well with the new breed filter. If you go back to any after searching for something else it will say no horses are found.

I've seen this a few times too :P At first I thought that the combo I was searching for just didn't exist, but that's not the case -_-