Since there are often so many cubs put into the giving tree and so you never really can know what any of them look like or if there is any potential in the tree, maybe change the way that the tree distributes the chased cubs and adolescents.

My idea is as follows

When you click to receive a cub/adol. You get a selection of 3-5 cubs that are in the tree, similar to how rerolling/rolling a new king works. After choosing to take a lion from the tree, your page would be locked so you're forced to choose one of the options. Perhaps a low SB cost to "reroll" the available cubs. This system opens up a few possibilities.
1) It allows users who choose to receive lions a small, but still random, choice in what they receive.
2) It could provide a means of communication as to what's within the tree. Say you look into the tree, take a cub, but also see a cub that has a base a friend might be wanting. You could let them know there is a chance to get one out of the tree.
3) A more minor thing, but I feel it'd give people actual thought to "Maybe my lion will end up someone's new king" when chased instead of it just more than likely being buried under the dozens of other lions and likely deleted in the long run.

Feedback 1) "What if there is a small amount of lions in the tree"
The system could be adapted to shrink the amount of displayed dependent on how many are in the tree. The example given below is that if there were more than 20, the default five could be shown, within the range of 20-10 there could show 3, and 10-5 could show 2. With less than that, the tree could just work as it does now, getting a single random cub given to you.

Lemme know what you think in the comments. Feedback is always welcome