Brightly-coloured ruffs stop cats killing so many birds - providing a quieter, snazzier alternative to a bell - Mirror Online
Birdsbesafe collar reduces savage bird killings by cats by more than HALF | Daily Mail Online
Birdsbesafe® Cat Collar Cover - Bird Warning Cat Collar, Scientifically Proven to Help Prevent Your Cat from Catching Birds : Amazon.co.uk: Pet Supplies
Stop Cat Bird Protecting Cat Collar Uvr Reflectors Night Reflecting Trim Trackable Reg.design 6084012 - Etsy UK
CAT COLLAR DANGERS VERSUS WILDLIFE SAFETY – Celia Haddon
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