Ok, so I think this would be a cool idea. What if player controlled animals could slowly and over time "adapt to a new enviornment at great food and water cost? Like a gigantopithecus growing longer, whiter hair and becoming am ice age yeti, or a mammoth moving to warmer climates and becoming more elephant-like. It would take a long time and cost extra amounts of food and water, and would prevent players from being successful in their previous biome, unless they decided to adapt again, which would take long again
It is a very non natural phenomenon, no ?
Hm, but this won't happen over-night, so you will have to play Stone Rage for years if not centuries to make your animals adapt to another environment.
Looking forward to your +100 playhours of Stone Rage, hehe
Mission received: challenge accepted