NP. Just another note, when I got the first 8 hour timer, I sped bred it, which was the Smitten Kitten. Then I immediately bred the same two creatures and got another 8 hour timer which was the Love Dove. I'm only pointing this out to show that they must only be available within certain time cycles? Hope this makes sense.
Since I started playing, I have noticed there is a pattern, but it is so random that I doubt it's possible to nail down exactly. I'm in the EST and have had much success later in the eve between 10 and 11. I bred the two Valentines creatures around 10:30. I've also bred multiple epic creatures in a row around the same time by immediately breeding again right after each other. I doubt that any of this is helpful though and any pattern I think I recognize could just be in my head. That's just another one of the crazy aspects of this game.
Bred a Love Dove (on the account that did not have one and also has room!) with Pyro Pony & Rock Rhino.