PG.com Magazine Article: Double-Coated Breeds
Wild animals develop a winter and summer coat based on daylight. As the days become shorter these animals will develop their heavy winter coats. As the days become longer they will start to shed their winter coats preparing for the warm weather. House pets, on the other hand, are exposed to artificial light and do not develop this exact cycle. Pets tend to shed all year round; however, the majority of the shedding does occur when the days become longer and pets are exposed to natural sunlight for longer periods of time................
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