how soon do you start putting a collar on these little tiny necks? the one i had made for chiwi is too big and a little heavy (yeah i admit i got swarvoski crystals put on it) and the other one i ordered i think might be too big as well. eek! and where can i get a ferret harness?? the petsmart i went to were out, and so was the one they called for me to see if they ahd any and the petco by me had a gas explosion the other day and the next one to me is a little too far.