My dog knows the difference between "chewies" and "fetchies". Chewies are chew toys; bones, rawhide, sticks, ect. Fetchies are fetch toys; kong wubbas, soft toys, frizbees, small ball, ect. If you say, "Get Fetchie!" then she will run as fast as she can to find the nearest fetch toy. That also works for,"Get Chewie!" which means that you want her to run and get some kind of chew toy. Kong Wubbas are her favorite Fetchie. Nylabones are her favorite Chewie. You can find Kong Wubbas at about any pet supply or feed store. Nylabones can also be found there. My dog is a strong chewer, so it is essential to buy the extra-hard dow Chewies. If your is always bringing back the wrong kind of toy for fetch or for sitting on laps, try the Chewie/Fetchie system.
Make sure to show your dog the difference between Chewies and Fetchies if you are planning to start using the system. Hold a Kong Wubba and say "Fetchie" before throwing it. Or say "Chewie" when holding a Nylabone. They may mess up a few times at the start, but make sure they know the difference. Treats or dog kibbles may help, liek when they bring the right toy back give them a treat, if not, don't. Pretty soon your dog will start to reconize the difference.