The Ferret Store has harnesses. http://www.ferretstore.com/harnessleads.html These are the H-style harnesses with the snap closures, which is the only type that I recommend. The neck loop should be snug enough to barely slide over the head. The chest strap should be snug enough to allow only your index finger to fit between the chest strap and ferret. This is loose enough that a ferret could eventually struggle free but snug enough to prevent quick escapes. Never leave your harnessed ferret unattended or with his leash attached to anything other than your hand. Debi Christy Ferrets First Foster Home [Posted in FML issue 3176]