This is a great Dog DVD showing training of dogs in competition catching discs. The great thing is that it comes with a supposed "free" puncture resistant disc. and believe me it is. We were going thru these cheapy discs from the pet stores like crazy (with 11 Pembroke Welsh Corgis) until we got them these discs. They have stood the test of time. Only thing, we have lost 4 of them in our pond. This has the smaller size disc for smaller dogs.