However, this can vary from dog to dog. In dogs that have had very bad experiences at a very young puppies, it may well be that it has no effect.
However, the dog's sake you should possibly defuse the problematic situations with the help of a good coach for the dog, then you no longer need in the long run also the Adaptil.
The shortcoming of the collar is that I think it's pretty ugly and it could endanger the animal may, if it gets stuck somewhere and thereby strangled the dog.
As an alternative to individual situations, one can also use a scarf and the spray. One then sprays the spray directly on the scarf (I took a multifunctional cloth that fits well with my dog, with smaller dogs but is likely to be too large) and waits until the alcohol (excipient) is gone before it creates the dog ,