Hey @PrairieDog116
in this case the spawning itself would be decreasing the performance of your game. Depending on what you want to achieve you could move the standard animals from under the map to the point on the map where you want them and then adjust their settings as saved in the chosen preset the user wants to spawn.
You could have a look at Actor Pooling, MassAI, VertexAnimation and Large Crowds in Niagara for some ideas.