User blog comment:BonesMcGee/Brainstorm: Potential savings in using the hurry hatch trick/@comment-5085023-20120804025240

Yes Robin, I agree that the random hatch dino den rare hatch seems to takebmany attempts. I noticed a signinificant jump once the fusion was perfected. I have suspected using the fusion hatch may take less coins in the long run since you are not earning coins as you raise your dinos to level 4 or a bit higher.