Why is my golden retriever suddenly aggressive to his owner?

Question

Our male golden retriever has started to be to much aggressive toward my fiance that is his owner also. He has changed suddenly his behaviour. Please help me. Pet's info: Dog | Golden Retriever | Male | unneutered | 2 years and 11 months old | 59.5 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

If this was a sudden behavior change for Luk, I would recommend having him examined by a vet before doing anything else - he may be sick or in pain, which can often cause aggressive behavior in dogs since they are less tolerant of many things when they don't feel well. Blood work to check his thyroid and other organ functions may also be recommended. If his exam and blood work are normal, then it's likely that you will need a veterinary behaviorist or a good reward-based trainer to help you with this in person - aggression towards humans is a complex behavior issue that is a bit beyond the scope of what we can tackle in this forum. Generally speaking, treatment for aggression problems involves identifying things that trigger the aggressive behavior, then using positive reinforcement to change how the dog feels about these situations. It can be difficult to do this safely on your own, which is why working in-person with a professional is always recommended.

Why is my golden retriever suddenly aggressive to his owner?

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