Hi i personally think they have a place but not round the neck of a dog under a year even 2yrs of age. I see to many people use them full time all day to work there dogs & to me that is a no,no. I dont see why people just dont train the dog first or seek advice as it is relativly easy to train cocker/ess or lab from my own experience to a steady standard for the field. It is when you start the dogs apprenticeship as i call it doing its first year of work that it all starts to come together & the dog starts to come on. Then say by 2-4yrs of age that the dog learns bad habbits & lear