Why is my 1-year-old dog aggressive after obedience training?

This is a hard question to answer without really knowing what is going on. If Max is becoming aggressive, growling, snarling, attempting to bite, etc, then this is a very complex and worrisome issue that should be worked with by a professional in your area. A trainer coming by in person can help observe what is going on, and provide more tailored training plans to address the issue. If Max seems nervous when you approach, you can work on getting him more comfortable with you by tossing a favorite treat to him every time you approach. Over time, he'll start to associate you with with something positive (the treat) instead of something negative. If he does growl or become agitated, moving away and giving him some time to relax before trying again is best to avoid escalation of any behaviors. If he is acting aggressively toward other dogs, separating him if things get too rough or a fight breaks out, and then reintroducing both dogs again slowly can help. Removing items of contention such as toys, bedding, bones, etc can also help reduce the possibility of a fight over these items.

Unfortunately, it's relatively common for behavior issues like this to develop between 1 and 2 years of age - this is the period when dogs reach social maturity. Often, they may have been fearful or nervous about many things when they were puppies, but don't start to act out aggressively until they are a bit older. Aggressive behavior in a large dog like this can be a serious problem, and is best treated by a professional who can work with you and Molly in person. I would recommend making an appointment with a veterinary behaviorist who can evaluate her and put together a treatment plan to work on the problem. You can search for a board-certified veterinary behaviorist here: www.dacvb.org In the meantime, I would recommend keeping her away from people and dogs as much as possible for safety reasons, and to avoid making the problem worse. Treatment for this problem is generally based on teaching the dog to associate good things (such as treats) with seeing people or other dogs, starting at a distance where they are comfortable and gradually working close from there. The behaviorist can help you with this, since it can be hard to do on your own! Punishment of any kind for this behavior (including verbal scolding, leash corrections, shock collar corrections, etc.) is not recommended, as it tends to make the dog more fearful and has a high risk of worsening the aggression over time.

I'm sorry to hear that you're having this problem with Brutus! Owner-directed aggression is a complex behavior problem that can be quite serious, especially in such a large dog. This is a more complicated issue than we can really address in this type of forum, so I would strongly recommend making an appointment with a veterinary behaviorist who can evaluate Brutus in person and help you put together a detailed treatment plan to work on the problem. This will likely include management recommendations, training exercises to work on, and possibly medication if the behaviorist feels that this would be helpful for him. In general, I can tell you that treatment for this problem normally involves identifying what situations tend to trigger the aggression (verbal corrections, collar grabs, and disturbing the dog while resting are all very common triggers), and either finding ways to avoid them, or working with Brutus to teach him to be more comfortable in these situations so that he doesn't feel the need to snarl or bite. Punishment of any kind is not recommended for this problem, as it is likely to make the issue worse over time and will greatly increase the risk of a bite. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org

I am very sorry to hear about your problems with Caleb. I would recommend discussing his problems with his regular veterinarian to determine if he is having hyper/playful behavior or true aggression. If he is exhibiting true aggression at this young age he needs to see a veterinary behaviorist ASAP because he is going to be a large dog and could be very dangerous. Your vet can guide you as far as where to find the veterinary behaviorist or if there is a special dog trainer in your area that may be helpful. Best of luck to you and Caleb.

I'm sorry that you're having this problem with Cssh! Aggression issues between dogs can be very complex, so without being able to actually meet him in person and observe his interactions with the other dogs, it's very difficult to say what might be causing this. Some dogs simply don't get along well with "new" dogs once they have grown out of their puppy stage - this could well be the case with your dog, since he's about 6-7 months old now. This isn't necessarily abnormal, but it may mean that your dog is not a good candidate for casual socializing with strange dogs. If you want to try and get a better idea of what may be causing Cssh's aggressive behavior and see if anything can be done to improve it, I would recommend making an appointment with a veterinary behaviorist - he/she can evaluate your dog in person and help you understand exactly what is happening. If needed, they can also help you put together a detailed plan to work on the problem. Your veterinarian should be able to find out where your nearest veterinary behaviorist is located, and set up a referral for you if you wish. In the meantime, I would recommend not allowing Cssh to interact with any dogs that he doesn't already know and like since there is a significant risk that he will continue to behave aggressively, which could cause injury to him or other dog.

I hate to hear this is happening. I;m sure it's not only scary but stressful as well. Canine aggression is a complex behavior as it can stem from dominance, possessiveness, fear, anxiety, resource guarding or a combination. Most people are not familiar with reading canine body language and training. Because of this, I recommend to work with a professional trainer. Researching on your own will also be helpful. Familiarizing yourself with canine body language and dog training can help you to recognize what your pet is trying to say. You can find many books written on the topic and there is a trainer named Victoria Stilwell who I think is particularly helpful. Also, dogs who are spayed and neutered are less likely to fight though this is not always the case. I recommend to discuss having both dogs altered with their veterinarian. Best of luck.

Unfortunately, this is a really common change in 2 year old dogs. Molly is reaching social maturity and things that used to bother her slightly but not cause a reaction are causing BIG reactions. She was probably always a bit nervous around other dogs, and now she's showing it. I recommend backing off her interaction with other dogs, so she's not practicing this aggressive behavior. No dog parks, etc. Then ask your veterinarian for a referral to a good trainer who can work with you on counter conditioning and desensitization to help Molly learn that other dogs aren't scary. This book is also very helpful if you don't have access to a trainer: https://www.amazon.com/Feisty-Fido-Help-Leash-Reactive-Dog/dp/1891767070