Walking cats on leash

Dear Warren,
I'm just so thankful you recommend walking cats on leashes!
I try to walk 2 of our 4 indoor cats daily (1 of the others got away from me once too often, the other--an adopted feral--is still untouuchable after 4 yrs indoors).
People think I'm nuts, but they come when called to be leashed, and it's a peaceful time out in nature for me. It also gives them contact with a stray I've been feeding for a year and will try to incorporate into the household.
Thanks Warren for what you do.