Fred, a UHF Scout transmitter attached to your favorite dog collar with heat shrink works great. A friend in Nebraska turned me on to doing it this way. You can apply heat shrink in 2 pieces—-1 over the first half of the antenna and 1 over the body of the transmitter. Simply cut off the piece over the transmitter when you need new batteries and replace. Marshall will eventually have UHF dog collars but not anytime soon.