A group of foxes is called a skulk or a leash. The term skulk is more commonly used and refers to a group of foxes that are together. The word skulk comes from the Scandinavian word skulka, which means to lurk or move stealthily. This term is fitting because foxes are known for their cunning and stealthy nature.
On the other hand, a leash of foxes is a less common term but is still used in some contexts. This term is derived from the idea of foxes being tied together, much like a leash would tie animals together.
Foxes are generally solitary animals, but they do come together during certain times, such as during the mating season or when raising their young. When they do gather, the terms skulk or leash are used to describe the group.