Andrew Walmsley / Adult male border collie portrait, Cumbria, January
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Tony Heald / African Wild Dog (Lycaon pictus) wearing a radio collar, Mana Pools National Park, Zimbabwe, October 2012
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Sharon Heald / African Wild Dog (Lycaon pictus) walking profile, wearing an anti-snare collar, also doubles up for tracking, Hwange National Park, Zimbabwe, October 2012
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Neil Aldridge / African wild dog (Lycaon pictus) adult male wearing a radio collar for research purposes, Venetia Limpopo Nature Reserve, South Africa, July 2009
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Neil Aldridge / African wild dog (Lycaon pictus) adult wearing a radio collar for research purposes, Venetia Limpopo Nature Reserve, South Africa, July 2009
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Petra Wegner / French Bulldog, bitch, lying down wearing collar
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Petra Wegner / French Bulldog, bitch, lying down
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Petra Wegner / French Bulldog, bitch, sitting wearing collar
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Petra Wegner / Italian Greyhound, bitch, lying down wearing large collar
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Petra Wegner / Three Italian greyhounds in a row, one sitting, two standing
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Petra Wegner / Italian greyhound, bitch, profile
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Petra Wegner / Italian Greyhound, bitch, sitting wearing large collar
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Petra Wegner / Italian greyhound bitch sitting wearing large collar
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Petra Wegner / Australian shepherd, black-tricolour, puppy, 7 weeks, sitting in basket
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Petra Wegner / Australian shepherd, black-tricolour, puppy, 7 weeks
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Petra Wegner / Yorkshire terrier and Yorkshire / Maltese crossbred sitting next to each other
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Angelo Gandolfi / The traditional iron collar used to protect sheepdogs from Wolf bites, Europe
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Jane Burton / Girl teaching Staffordshire Bull Terrier cross pup to give a paw
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Jane Burton / Dog collar with name tag
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Jane Burton / Yellow Labrador Retriever pup scratching his ear, 8 weeks old
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Jane Burton / 11 month old boy playing with Patterdale x Jack Russell Terrier pup, 12 weeks old
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Jane Burton / Girl combing Yorkshire Terrier cross dog
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Jane Burton / Leather and plaited rope dog collars.
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Jane Burton / Two Yellow Goldidor Retriever (Golden Retiever X Labrador) pups with daisy chain collar and lead.
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Jane Burton / Blue Roan Cocker Spaniel pup lying down, 14 weeks old.
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Ernie Janes / RF- Two Yellow labradors in garden, one licking the other, UK. (This image may be licensed either as rights managed or royalty free.)
