Looks like an Appendix Quarter horse type that was probably dumped due to the quittor type growth on the inside of his right hind hoof. You can see it in several of the photos on their page. This is an expensive and extensive Vet bill. Poor horse may never recover or be sound.
These faux and real kill pen pages are nothing more than low life horse flippers where the proceeds, in some cases, directly funds horse slaughter. In any case, these horses were not bought for slaughter but to resell to bleeding hearts. These places are also cesspools of communicable diseases like Strangles. Notice the white nasal discharge in this photo.
If you are looking for a young, tall, sound, athletic, Warmblood chances are highly unlikely to find that on a kill pen page. Even pre COVID. You would have better luck finding that needle in a haystack on Craigs List.