I only put a collar on mine when I'm trimming them up, to trim their backs & bellies. I can't leave one on either Tiffanie or Teddy they chew each others off! And Teddy has got his caught in his teeth before from tryin' to chew his own on.
Hugs, Lee & Babies
Tiffanie "Tiffy" Ranae:
http://www.dogster.com/?316369 Theodore "Teddy" Roosevelt:
http://www.dogster.com/?316383