Marshall Harness and Lead Combo Sets www.petsmart.com - $9.99 Product Description: Ferrets enjoy being taken for walks, and it's important to have them on a leash for safety. This harness is fully adjustable and designed to fit ferrets of all sizes. Quick snap buckles make it easy to put on and take off. 48" matching lead gives your ferret room to roam while staying safely in your sight. RattyRat's Review: This harness was very difficult to fit and adjust, and didn't work very well for our smaller rats. Once adjusted to a specific rat it worked fairly well, however it was a little cumbersome and some of our rats could wiggle out of it. This harness is best for larger male rats.