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Why is my puppy aggressive towards other puppies but good with older dogs?

Updated On September 23rd, 2025

Pet's info: Dog | Miniature Schnauzer | Male | unneutered | 5 months and 13 days old | 5.09 lbs

Our mini schnauzer puppy (5 months), Oliver, is aggressive towards other puppies. He plays very well with older dogs but not puppies. Any ideas what it could be would be helpful or ways to train him to play nice?

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on April 24th, 2018

Gradual desensitization, correction of negative behaviors and patience are required. Slowly introduce him to one pup at a time. Correct any aggression immediately and praise/reward good behaviors. As he acclimates to one pup, introduce him to another (slowly) then another and another. Be consistent in training and corrections. A pheromone product, such as the Adaptil collar, may decrease and anxiety or aggression. A structured puppy socialization class may also be of benefit. Contact the local Petco for a list of offerings.

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