Our cats wear collars and bells - until they are motionless the bell 
helps.  So do the dogs and when they were tiny, the kids and 
grandkids as well.  Hard to tell your kid you stepped on his/her kid 
and smashed it!
Pat, K9JAUAt 05:06 PM 6/16/2013, you wrote:
>lol, I've never seen one of those things either but I have a cat who if he's
>not tripping me, he's doing that. Ours are indoor cats and never go out but
>have been trapped in the sun room over night before when I was out on a late
>night ham radio net or something since my station is out there. I've often
>wondered about something like that myself or a bell or what ever but if
>they're perfectly still, the bell won't do any good either.
>----- Original Message -----
>From: "Howard Kaufman" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Sunday, June 16, 2013 5:40 PM
>Subject: radio but not ham radio
>
>
> >I sat outside for five hours yesterday morning listening for escaped cats.
> > They know if they get out, that I can't find them if they don't move.
> > Well,
> > that left me plenty of time to think.  I have never seen one of those key
> > finder things, where you have one device that makes a noise, and a remote
> > that activates it.  So is the receiver to heavy for a cat collar?
> > Wouldn't
> > the cats be surprised to make noises when they didn't move?  Is this idea
> > pheasible with out being inhumane?
> >
> > You know they are sitting stock still a foot and a half out of my reach;
> > laughing their heads off at me.
> >
> >
> > H T Kaufman MSW LCSW
> > Adaptive Technology Instructor