Here's why:
* Foxes: Depending on the species, foxes can range in size from about 18 inches to 40 inches in length, and weigh between 5 and 30 pounds.
* Chihuahuas: These tiny dogs are the smallest breed of dog, typically weighing between 2 and 6 pounds and standing 5 to 9 inches tall.
Even the smallest fox species would still be significantly larger than a Chihuahua.