Cats have a very wide range of emotions, including jealousy, so this claim is true. Along with feeling love for their owners, cats can also feel jealous of other pets or people. Similar to humans, when cats find “their person” they grow a strong bond with them. So, if another cat impedes on their territory, or interacts with their human, the feline companion can become hostile. For instance, some cats dislike when their owners have another cat’s scent on them. But felines all have different personalities, and some get more “jealous” than others.
Based on an article by PetMD, many animal behaviorists agree that cats “do show a form of jealousy,” but that it is different from the way that humans feel envy. For humans, envy is when we feel resentful of someone else, maybe because their lives appear more glamorous, they have better belongings, and so on. While humans may become more reserved when they’re jealous of a person or of a relationship, jealousy in cats “presents as aggression.”
Cats have egos, and they don’t like their status to be shaken. When they sense another cat trying to take control, they react harshly. This form of jealousy is somewhat similar to our own, but felt in a different way. According to Kinship, another sign of jealousy could be destruction, such as knocking over objects or biting. Additionally, as stated by Cats.com, kitties can “get jealous of other cats’ meals.”
Overall, it’s important to show your cat lots of affection so they don’t feel left out, and take out their anger on you or other pets. However, since jealousy is such a complex emotion, it can be difficult to understand to what extent cats may experience it.
Sources;
https://www.petmd.com/cat/behavior/do-cats-get-jealous
https://www.kinship.com/cat-behavior/jealousy-in-cats#:~:text=Some%20jealous%20cats%20never%20behave,what%20you%20are%20working%20on.
https://cats.com/do-cats-get-jealous-of-other-cats