I am bringing home a new 12 wk old standard poodle puppy. I asked the breeder what he has been wormed with and she said only ivermectin. Isn't that strange I thought you start with pyrantel and then I always use drontal plus when they are old enough? I really like this puppy but she breeds other dogs so I want to make sure he is healthy to be around my other dogs. I will keep him apart for several days and get him Vet checked.