How to Breed CryptoKitties

The world of cryptocurrency is a complicated one. That a team of developers were able to create an entire game on the Ethereum blockchain is amazing. CryptoKitties has enjoyed almost three months of success. To an outsider looking to get in on the fun, the game can look confusing. But like many other things, once you know what you’re doing, it’s second nature. Here’s a quick guide on how to breed your own Kitties.

Before You Breed

Before you get to breeding, there are a few things you’ll need:

  • Two kitties ready to breed
  • A Metamask wallet
  • Enough ETH to cover the cost of breeding

The guide pre-assumes that you already have these. If not, transferring ETH and buying kitties to breed are both covered on the official website.


From the website homepage, click on “My Kitties.” You’ll be given a page that shows all the kitties you currently own. Choose the two you’d like to breed together.


Click on one of the kitties to be taken to their page. Next to their bio, you’ll find a few buttons that say Breed, Sell, and Gift. Click on “Breed.”

Click “Sire with my Kitties” to select the next kitty. Be careful which kitty you pick first. They became the sire; basically, the father. The only functional difference is that the mother (the second cat you pick) will lay the egg.

All that’s let to do is click “Ok, give them some privacy” and wait. Before you know it, you’ll have a new kitty for your pack.


The traits the new kitty will have are a combination of the two parents. Our new kitty here has the sire’s fur style and eye color, but the mother’s color. His tail is skinnier than either parents’ though. That’s because of dominant and recessive traits. Just like in human genetics, if both parents carry a recessive gene for a trait and the kitty receives both of those genes, they will have the recessive trait. In this case, both parents have dominant bushy tails and carry the recessive trait for a skinny tail. The offspring received both recessive genes, so his tail is skinny, not bushy. Dominant and recessive genes make the game even more complex and fun to experiment in.

Keep in Mind

Most things in CryptoKitties rely on strategy of some sort. When you breed, either kitty can be the sire or mother. This doesn’t affect your new kitty’s appearance or traits. It also doesn’t affect the cooldown of the offspring, but it does affect the breeding speed of the mother. After every breeding, there is a cooldown period before a kitty can breed again. Every breeding makes the cooldown go up a little more. Fast kitties only have to wait one minute. By the time you get to Sluggish, the breeding period goes up to between two and four days. Because of that, having Fast, Swift, and Snappy kitties act as mothers is best for those who want more kitties in a shorter time. Faster breeding times increase a kitty’s value on the marketplace.

In addition, a new kitty’s cooldown period has nothing to do with the parents’ cooldown. That is determined by both generation number and luck. Two Sluggish parents can have a fast offspring. In this article’s example, two Sluggish parents had a Plodding offspring, which is two degrees faster than either parent. Variables like this add another layer of strategy in making kitties that others would like.

Those are the basics of breeding in CryptoKitties. Once you learn the steps, it becomes easy to do and even more fun to try and breed for specific traits. So get out there and breed some kitties. Good luck!

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