We have a small very stress-prone female from Spain (killing station). We already know the collar of our former dog, he was very old and got some anxiety because of a heart problem, then we got from our vet a Adaptil-collar and anxiety were after a short time or under control were no longer in front! Our dog wearing the collar for a week now and you may find that it is already more calm and relaxed. We still have yet to meet any problems in succession with other dogs or with strangers, but they can be much better now calm. I would recommend the collar on, but it should be remembered that it is not a panacea and is still working with the animals still need to fight the fears. If one reads the reviews here is believed that many people think ... the collar on and is good! This works so definitely not! We will continue to work in any case with the assistance of the collar.