January-28-2021, Dragon City had introduced new visual effects while Breeding: The Golden Heart identifies that the breeding of a very special dragon (obtained by empowering its parents or being sanctuary exclusive) is “in progress” and The Red Heart signifies a more common dragon.

However, this update is not applied to the Ancient World. It has some additional feature: Using Empowered and high-rarity dragons gives you an edge during breeding by unlocking new breedable dragons, The “Possible Results” button is added and new visual interface, etc.

In November-30-2020, Breeding Reborn Update was introduced.

Currently most dragon's breeding times are equal to the hatch time. Previously, the breeding time was calculated as a total of the parents breeding time. The probability of getting a Pure has since (LaW update) been changed.

Approximately 6:30, Septemin Tuesday, an official update in Dragon City's Facebook page showed that Rarity Boost raises the chances of getting a Rare, Legend or Pure Dragon is increased by 50%.

Many of the dragons from the Deus Vault are now breedable, and are now classified as Breedable Exclusives.

Sometime Mid-2013, the Deus Vault was removed from the Store.

Due to the change in the status of the Pure, it and Pure Hybrids are now very easy to breed.

The Pure Dragon is now an Elemental Dragon, and can be bought at the Store.

As at 26-July-2013 (LaW update), the Breeding system has been changed.

Gen(eration) classification of each dragon is a DCW-made device to assist players in the determination of the likelihood of breeding that dragon.

The breeding system is similar to the one from pokémon games.

Breeding in normal world gains some contribution points to Breeding Alliance Chest however, breeding in Ancient World does not contribute it.

Dragon city game breeding guide