[header] How to train your ferret to walk on a leash [title] Purchase a h-style harness. [step] Visit your local pet store and purchase a h-style harness for ferrets. Do not buy a collar or a figure-8 style harnesses. 
Your ferret could easily slip out of a collar, and the figure-8 harness is often too loose on one side and too tight on the other. [substeps] The harness should be made of nylon and have plastic buckles.