The phrase "chase instinct" refers to the natural tendency or instinct in animals, including humans, to pursue or go after something they desire. Full definition
They can be aggressive towards other dogs and have strong chasing instincts, so if you happen to have a pet in your household, you should think twice prior to buying this breed. (puppiesdogs.org)
All dogs are born with some degree of chasing instinct. (petpeoplesplace.com)
However, keep in mind that this breed has strong hunting and chasing instincts reminiscent of its past as a hunter. (puppy-training-solutions.com)