Ordered for my 16 Shepsky\'s Simpatico trio, 10 20 to 40 lb puppers, and 6 60 to 100lb adults. My local vet required 16 office visits to get the prescription 2000$, and 600$ for the medications, for just one months supply. Outrageous, think my price from. Pet Bucket was around 200$, about 1/3rd the price here in the US. Delivery does take awhile compared to Amazon or Chewy, but it arrived a week before the initial estimate for arrival. Worked perfectly, 0 fleas for 3 weeks now and I didn\'t know my pack had roundworm, day after dose the worms got out of Dodge, stools were loaded with them. It\'s the real deal for sure, just in England no prescription is required and it\'s made in Europe, Belgium or Netherlands i think.