There are 3 distinct types of NFTs in Dogs Unchained:
Dogs are unique NFTs with a maximum supply of 9,999. They each have their own traits and images and are the core of the Dogs Unchained ecosystem. A unique capability of Dogs is that they can be "Boomed" together to combine their traits selectively, burning a Dog in the process. This makes Dogs deflationary. In addition, they can be staked to earn $BOOM token as well.
Proof of Steaks are NFTs that were sold as part of a pre-sale. Each Proof of Steak could be redeemed for a specific number of Dogs that were pre-paid for. In addition, they give holders "Steakholder" status. Proof of Steaks can be redeemed at any time. Many have already been redeemed for their Dogs while many are unrevealed.
⚠️ They can be bought on OpenSea, but users looking to redeem them should double check using the Validator to see if they still have balance ⚠️
Proof of Steaks, both redeemed and unredeemed, can be staked to earn $BOOM token at a rate 2x faster than a single Dog.
Puppies are an unreleased token that are given as a reward for each Level 5+ Dog. They can be staked to earn $BOOM token at a rate 7x faster than a single Dog.