Each animal has an Animal Star Rating that is rated out of 5 stars. This rating increases over time based on how well you look after your animal; a higher welfare will mean their star rating rises faster. An animal's lifespan also affects how easy it is to reach a 5 star rating. The better the animal's Longevity gene the more time there is for the animal to reach 5 stars.
Animal Coat Variation
An animal's coat can have both colour and pattern variation depending on species. Coat variation is passed on through genetics. This includes rare genetic variations such as albino animals. If you’re looking to encourage a particular coat variation, breeding animals with the same coat variation increases the chance of this passing to their offspring.
However, be sure to maintain a good level of genetic diversity in your breeding pairs or you may bring in more compromised traits.