The way you select wolves for activities such as selling on the flea market, sending in trades, and changing a marking or breed is currently frustrating and illogical.
Right now, the wolf selection goes by the first wolf in the first den, the first wolf in the second den, the first wolf in the third den, and so on. And just to make it worse, that's the first wolf from the first den you buy, the first wolf from the second den you buy, the first wolf from the third den you buy, etc. If you re-order dens, the order on the selection stays the same. So you could have the first wolf you can select literally sitting in your last den. This makes no sense, and I feel is actively hurting the selling of wolves on the flea market.
The only wolf selecting that I have seen so far that actually makes sense is breeding, and there the wolves are arranged alphabetically by name.
I can see at least two solutions. The first would be to have all of the times you need to select a wolf they're arranged alphabetically, like breeding. The second would be to have it in exactly the same order that our dens are arranged.