Bald spots are not normal in dogs of any age and the cause of hair loss should be investigated by your veterinarian. Balding could be linked to a few health issues including: Genetics – illnesses and health conditions that cause fur loss are a sign of an irresponsible breeder. Good breeders will conduct genetic testing to reduce the likelihood of health conditions and diseases in their puppies. Cushing’s disease – when a dog’s body produces too much of the stress hormone cortisol, it can cause bald spots. This condition needs to be diagnosed and treated by a vet. Pressure sores – repetitive motion and too much grooming can cause pressure sores, which leads to bald spots from the irritated skin. Hypothyroidism – bald spots can indicate when a dog’s thyroid is underperforming. Speak to your vet for diagnosis and treatment options.