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Hypothyroidism in Dogs
If your dog suddenly gains weight and seems unusually tired, it might be more than just ageing—these could be signs of hypothyroidism. This condition occurs when the thyroid gland doesn't produce enough hormones, crucial for your dog's metabolism and overall health. When the thyroid isn't working properly, it can affect almost every system in your dog's body. Hypothyroidism is especially common in medium to large breeds and rare in smaller ones.