When I play multiplayer, I have not tried singleplayer but I bet its the same there, 0 Dinos can breed and no matter any fix you try, you cannot place structures as any dino. Its quite a let down that it hasnt been fixed or looked at. Someone told me to check the box "Breeding Allowed" on the menu, and I did that, and still 0 dinos can breed. Still sad. I would appreciate a look into it at the least.