This is a combined sale of items to prevent coprophagy (eating feces) and excessive barking, including muzzles. One "Stop Eating Feces" product is unopened, and the others have been used a little. The muzzle sizes are 1 and 2 in photo 7. The white anti-barking device on the right uses ultrasonic waves that are inaudible to humans but audible to dogs to teach them "no." It's a training tool for dogs that can easily help prevent excessive barking, biting, pulling on the leash, and scavenging. The battery is dead, so please replace it yourself. All items do not have their original boxes. Instant purchase is welcome. I am also selling other pet supplies.