Hot Doll is the world’s first sex toy for your dog. Here are the rules for usage from the website.
Hot Doll is on no account a medical or therapeutic object. Hot Doll is above all a design product, companion of your animal, and we do not guarantee the use of the Hot Doll by your animal. You should never force him to use it. Consult a veterinarian if your animal uses the Hot Doll intensively. Hot Doll can fail in the following cases when the dog is too old, or on the contrary too young and inexperienced. If the dog is used to rubbing against pillows or others objects, the master has to teach him that Hot Doll is there for that purpose (as for the place where he sleeps, the toys that he has the right to use, etc.). The mating between the dog and a Hot Doll can last on average between 15 and 30 minutes. Hot Doll is exclusively reserved for dogs. Hot Doll disclaims any liability in case of abnormal use of the product. Always ensure a discreet presence when your dog is using Hot Doll and Clean and inspect the Hot Doll regularly.
I don’t have anything to add. Below is a pic of the toy.
DUMMR.com 
“But I can tell you…it was certainly the last time I let a horse bugger me…and he never called either…horses can’t live with them.”