Why is my old dog aggressive towards my new dog? What can I do?

Question

Hey, so I got a new dog and my old dog seems don't like him so much. He always spit himself when he barks on my new dog. Any solution? and what happen. Pet's info: Dog | Toy Poodle | Female | 1 year and 8 months old | 11 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

I'm sorry that your dogs aren't getting along! Without being able to actually observe them together, it's hard to say why this might be. I would really recommend getting in touch with a veterinary behaviorist or a good reward-based trainer who can evaluate both dogs in person and help determine what the problem is. This is important to figure out first, in order to know how to help. In the meantime, you can try separating the dogs at all times except when you are working with them. You will need another person to help you. Practice having both dogs on-leash at a distance from each other at first, with both dogs getting treats for calm behavior. Once they are doing well at a distance, you can gradually move closer together as long as they are both comfortable. You can search for a board-certified veterinary behaviorist in your area here (dacvb.org) or a qualified trainer here (ccpdt.org)

Why is my old dog aggressive towards my new dog? What can I do?

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