Time for every tribe to build a hospital! These healers are amazing, you can go out on your wyvern getting meat to feed them and when healed up getting meat again because they never stop eating. A never ending cycle, fun!
At this moment, Daeodons DO NOT get a pack bonus and only eat meat/kibble. Its healing ability has a minimum regeneration of 3 health per tick (about 1.8 ticks per second) and a maximum of about .2% of Max health. This holds true until above 100k Max health, where the regeneration is at a much lower and random percentage (Tested on single player with my caveman eyes, so please correct me if I'm wrong).