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My dog is suddenly aggressive. What's causing this behavior change?

Updated On September 23rd, 2025

Pet's info: Dog | Beagle | Male | neutered | 2 years and 2 months old

This year Floyd developed a (skin tag) I think (has not grown and still same colour. But during this month he has barked alot at night and this week at night I put my flash light on and he made a horrible noise at myself through the window. Which made me jump. As it is unusual and was scary. He today went for a walk pulled so hard he broke his lead and hurt another dog. I am worried as my dog has Never shown any signs of aggression. I would see the usual neck hairs flare and he pulled always has

1 Answer

Most Helpful Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on March 21st, 2019

I hate to hear that about Floyd. Aggression is a very complex problem and one that may be difficult to fix without a trainer. Aggression can be related to dominance, possessive behavior, fear or anxiety and each one needs to be addressed in a different fashion. The trainer will be able to determine the cause. The trainer will then work with you and your pet to modify both of your behaviors to meet a common goal. There are several different training methods so you will need to find the one that works best for you and your pup. You should also pick up a few books about dog behavior and dog training so that you can learn to recognize your pet’s body language. By knowing what he is saying, you be better able to react before he reacts. You should also have Floyd examined by his veterinarian to make sure there’s no evidence of pain or infection which could cause a certain behavior change. Since he can’t talk and tell you what is wrong, it is best to be cautious and play it safe. I hope this at least points you in the right direction. Please post again with any further questions.

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