The Pavia Rectal Temp is the fastest rectal thermometer at 6 seconds. It can be used on dogs, cats, horses, goats, llamas, pigs, sheep, and other livestock. Beware of the Pavia Rectal Temp look a likes that are made in China.I see they are sold on Amazon next to the Pavia Temp and are cheaper. You get what you pay for. They are sometimes called “quick reads” or “fast reads”. They take 30 to 60 seconds so are not quick or fast! The Pavia has 14 years of quality control and great customer service in the United States. The Pavia Rectal Temp comes with a 90 day warranty for free replacement through Pavia Sales Group.