Hope only good results come your way ((TB)).
Glad you got stuff figured out with Dorothy, ((TOD)).
((Amy)) - I have no experience training cats on harness, but perhaps it's like some dogs that don't like harness that you have to train to walk and move around in. I'm not sure about the walking part, but putting it on randomly for really short periods and longer periods while Mots is in the house lazing about might allow him to get used to it. Perhaps he'll take a snooze with it on and realize he still wakes up and nothing bad happened. He might run under the bed, let him do his thing. Once he's used to it inside, then try to take him outside with it on. I have no idea if this will work, but that's what I think to do. Is Mots very food responsive? Can you lure him with treats to walk around in a harness? Personally, I find that Sasha is not that food motivated...they're not quite like dogs that way. I can't speak for Mots though.