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Why is my 4-month-old puppy losing hair all over? Is it allergies?

Updated On September 23rd, 2025

My pup is 4 month.He has got some allergy because of which his hair is falling from all over. Help please

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Answered By Jessica Desrosiers

Veterinary Technician

Published on August 7th, 2018

Poor pup! It would be best to bring him to a vet for a complete exam and to have a sample taken from the areas where there is hair loss. Allergies can definitely play a part in hair loss, however ruling out other issues such as parasites (fleas, ticks, even internal parasites), illnesses, or fungal/bacterial infections is best to do as well. If allergies are suspected, your vet can work with you to try a diet change for any food allergies, or get started on a medication to treat any environmental allergies. Until you can get to the vet, placing an Elizabethan (cone) collar or T-shirt on your pup is best to keep him from licking and scratching at the areas where there is hair loss. This can help prevent the spread of any infection or prevent a secondary infection from taking hold.

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