I have been playing on Xbox single player. I have found if you get a dimetrodon it will incubate anything. I have used it to incubate wyverns and magmasaurs. Also if your wyvern egg is lvl 50 or higher it will usually become an adult before it runs out of food. If you have lower lvl just babysit it with a snow owl. Wait for the health to get halfway and then heal with snow owl.

Une fonction calculateur on on entre la nouriture actuel de la wyverne et cela nous dit dans combien de temps donner du lait

Didn’t see this but maybe add the max level of the eggs etc in the level picker. where the Dino’s that have higher levels then normal Dino’s. due to the egg stealing like wyverns etc levels in the level picker. Sorry I’m bad at explaining things into text