Remy was 3 lb. when she started to wear the collar ( she is 4 1/2 lb. now ) , yes it was large on her so I only put it on her for the shortest time neccessary when she was outside going potty . My neighbour is such a bitch ! she has filed complaints against all the people around her that have dogs and a few that don't ! The fines for noise are high , debarking or rehoming Remy are NOT an option for me.Just remember the spray does'nt hit the dog in the face, it goes up in front of their face and its a very fine mist. The collar can only be filled with the canister designed for the collar so water or whatever else can't be put in it. There are two styles of the anti-bark collar that I bought ,one has a remote that you use to trigger the spray so you can choose when to correct your dog ( this is the one I have) the other is just triggered by the sound of the dogs bark.
While I didn't like the idea of useing this on Remy It was neccessary and has worked very well ,she seldom has to wear it now
Eileen