The thrashing shark is a hoot for small dogs. It was a startling initial introduction but the mini schnauzer herds it into many farsical situations!

IMO- the toy does not seem appropriate for med-large dogs. The inner ‘flop’ inducing machine, once clamped by bigger dog jaws, or shaken/shredded could become a medical Harvard: chipped or broken tooth/ingestion of the power unit parts. But for dogs under 15 pounds, this toy is great…for the dog or cat in your home.

After awhile the mechanism slips sideways and it goes from tail-wagging shark to humping shark which is hilarious and gets the dog's attention more anyway since it actually bobs up and down on the ground making noise. I had my wife come up stairs wondering what the methodical "bumping" noise was though, lol.

This is my second shark purchase. The other one lasted about a year before my dog was able to chew through it and break the motor. Out of all the interactive wiggly toys, this one has the most padding to it. The fish don't have enough stuffing and tend to break after a while because there's nothing protecting the power pack inside. The sharks motor sits in the body where most of the stuffing is and is accessed through a velcro opening inside the shark's mouth. Comes with it's own charging cable and the motor can be removed or left inside the toy while charging. There's an on/off switch so it doesn't keep wiggling around while it's charging or if your pet needs a time out. The body of the motor is cased in plastic for better protection. You'll see a red light inside the power pack while it's charging and once the battery is full the red light will turn off to indicate a full charge. I'd say a full charge lasts about a week give or take. Depends how often your pet plays with it. My dog likes to give her shark a few maulings with the occasional burial two or three times a week. It's by far one of her favorite toys to play with. That and the yipping ball that bounces and vibrates. She's still a puppy at heart and hasn't slowed down one bit. Having these interactive toys has helped keep her engaged and given her something more entertaining than a squeaky toy. To me, it's a very small price to pay for my dogs happiness.