So I was using the Search to find suitable studs for my ladies, as usual, when I realized something: there is no option to search for studs who only accept a certain fertility %.

To be more clear, some studs have their settings chosen so that they may only accept lionesses with, say, 20% or higher fertility; if you're presently needing a stud for your 5% lioness, well, there's a whole lot of wasted time spent sifting through countless studs, many of whom you don't even have the option to breed her to.

My suggestion is this: Add an accepted fertility % threshold to the Search.
For instance: If you want to find studs who will accept a 1%-10% lioness, simply type 10 into said fertility box, and it will then exclude those who take only 11% and above, thus reducing wasted time trying to find that one dude who will breed your lady!
(Alternately, maybe have a way to search for a specific range instead, e.g. 50%-75%, or 10%-15%, etc.)
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Edit | From a helpful post by #126220:
Alternative that will help but isn't exactly what we need, sorting by group (goddess vs vlf vs good, etc)
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Tl;dr: Allow us to seek out studs by their accepted fertility range, to save time and effort!