Why does my dog have hair falling out in clumps?

My dog is a chocolate lab about 8 to 9 years old from humane society. This started about 3 weeks ago - he has these big scabs with hair falling out in clumps all around them. Does anyone have guess as to what this could be from and what is it?

    Why does my dog have hair falling out in clumps?

    My dog is a chocolate lab about 8 to 9 years old from humane society. This started about 3 weeks ago - he has these big scabs with hair falling out in clumps all around them. Does anyone have guess as to what this could be from and what is it?...
    General Dog Discussions : Why does my dog have hair falling out in clumps?...

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    • Why does my dog have hair falling out in clumps?

      Why does my dog have hair falling out in clumps? General Dog Discussions
      My dog is a chocolate lab about 8 to 9 years old from humane society. This started about 3 weeks ago - he has these big scabs with hair falling out in clumps all around them. Does anyone have guess as to what this could be from and what is it?

      Why does my dog have hair falling out in clumps?

      Why does my dog have hair falling out in clumps? General Dog Discussions
    • could be something simple as fleas or allergic reaction or something a little more serious like a thyroid condition. You need to take the dog to your vet and have a professional diagnosis.