Limiting the spawn levels of the Dodo


I would like to limit the range of levels some NPC’s can spawn at, so for example limit Dodo’s to less than say 50 and Have T-Rex only spawn at 80 or higher.

Where would I start looking for this? Do a make a child of each dino and modify it? Are the levels set in the dino class or os ti somewhere else?

Assuming I make a child, will it work with any updates to the parent class? (I am a noob with the UE4 blueprint system so not sure how closely it relates to OOP concepts)