Hi: Was unsure how to give you the correct answer so I asked Brenna's breeder to check out your question and provide a response. This is what she replied:
"It is common with young dogs or green dogs to toss the equipment to tap the dogs prey drive. Prey is the drive the dog hunts and kills in, it is a confident drive, confident state of mind...so early training uses the benefits of that drive to acclimate the dog to the work and build their confidence. This is especially necessary with young/immature dogs who cannot yet mentally handle the stresses of defense. In addition Schutzhund is a sport so most Schutzhund hobbiests don't care if their dog is equipment oriented so if an adult dog shows signs of stress in their work, like hackles up, the trainer may toss the sleeve a few times to push the dog more into prey.
In this case (the video) in particular however...this dog tends to favor one sleeve over another and gets distracted when the first sleeve is tossed aside and she can see it. The trainer here is trying to trick her into accepting it seamlessly by tossing the first sleeve where the second sleeve was hidden (the first attempt the dog caught it as he kicked it which she wasn't supposed to but she won so it was praised)".
Figured Melanie could explain it much better than I ever could.
Felice vom Amulree, SchI, TRII, CD, RA, CGC, TDI
Andi Bojovnik "Brenna" Bh
Finnegan von der Zahnburg
RIP Duchess Liberty of Bayberry, CD, RE, CGC, TDI
RIP Liberty's Favorite Falon, CGC, TDI
RIP Moriarity's Renegade of Orchard Court "Reno"