How much tail is cropped off on Jack Russells?

Tail docking in Jack Russells typically involves removing a portion of the tail, usually about one-third to one-half of its length. The practice is often performed for cosmetic reasons or to adhere to breed standards. However, it is important to note that tail docking is controversial and regulated or banned in many countries due to animal welfare concerns. Always consult local regulations and veterinary advice regarding this practice.