So sorry if this has already been suggested, please link me to the original if so.

I think it would be helpful to have a filter option for a lion's generation as well as possible inbreeding within their lineage, both for the search feature as well as the trading center. If I'm simply overlooking this feature (I suppose it's possible considering how many filter options there are on search and TC, but I doubt I've missed it) please make me aware!

This feature would be beneficial for convenience, such as for breeding purposes if one is looking to avoid inbreeding or looking to breed to a G1 stud, as well as for shopping purposes such as if one is looking to buy an NCL or groupie.
This feature is already present on wolvden, which makes sense because the economy is rooted in G1/NIBs, however I think it would be a helpful filter option on lioden as well.