"Instinctive desire" refers to a natural and automatic longing or urge that one has without needing to think about it. It is a deep, internal feeling that drives someone to want or pursue something without conscious effort. Full definition
You can even also purchase «cat washrooms» which not only hide the litter box, but complement your décor and may satisfy your cat's instinctive desire for privacy. (1800petmeds.com)
Playing off of your dogs instinctive desire to hunt, they will work diligently to get all the bees out! (mydoglikes.com)
It still has a strong instinctive desire to chase smaller animals, especially cats, and it can be strong - headed. (petwave.com)