It would be super helpful to be able to filter horses by gene when using the Breeding tab.  That way we can see which of our gene-tested horses have specific genes when we select them for breeding.

As it stands, without putting genes in their name, you have to select the horse, right click on it's name to open its page, then go to the DNA tab (if tested), and view the information.

Signed,
Someone who breeds way too many horses for her own good