The Company of Animals Dog Whistle is a good all-round whistle perfect for the pet dog owner and professional alike. Made from tough steel yet a lightweight design providing a clear consistent sound. Ergonomic design with key ring attachment. The COA Training Range has the essentials for the modern day dog owner, developed, tried and tested at the Animal Behaviour Centre of Dr Roger Mugford. Designed to suit dogs and puppies alike, COA is a comprehensive range of training aids for both the complete beginner or the experienced professional dog trainer. Our 30 years of experience in dog training really shines through in the COA Training Range.