He was listed as a Collie/Sheltie mix : r/DoggyDNA
Sawyer's Web Page
Shetland Sheepdog - Wikipedia
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Rocky Mountain Collie-Sheltie Rescue
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Shetland Sheepdog - All About Dogs | Orvis
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Rocky: Sheltie/Collie Mix Breed Puppy Testimonial – Curious Puppies
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Rascal's Web Page
Cosheltie (Collie & Shetland Sheepdog Mix) Info, Pictures, Traits | Hepper
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A History of Shelties | Sheltie Planet
The Top 40 Shetland Sheepdog Mixes You Will Adore
Sheltie History: Learn about the evolution of Shetland Sheepdogs
Border Sheepdog Mixed Dog Breed Pictures, Characteristics, & Facts
Collie vs. Shetland Sheepdog: How to Tell the Difference
Collie vs. Shetland Sheepdog: How to Tell the Difference
