My dog bit me. Why is my dog suddenly aggressive and irritable?

Oh dear! That is a worry for sure! It's really important that you don't get hurt, because dog bites can be pretty serious. I would suggest making an appointment with your vet to talk about possibilities. They might be able to link you up with a behaviorist, or dog trainer that could help a lot. There also could be medications that might help. Or, like you said, there could be a medical problem that is upsetting him.

Biting aggressively is a serious concern and a very complicated thing to deal with. Leash aggression can sometimes manifest and be redirected toward the person putting on the leash, however if this suddenly happened out of the blue I'd be concerned. A good first step with any behavioral issues that comes on suddenly is to schedule a vet visit to rule out any issues such as pain or illness. Something wrong such as a slipped disk causing pain in the neck or shoulders may make having Griffy's collar or neck handled painful, causing him to bite. If he checks out healthy, talking with a trainer or behaviorist in person is a good next step. They can work with you on a plan to gradually reintroduce the leash to Griffy through positive experiences (such as giving a treat when you bring out the leash, gradually getting him used to it again, etc) and can observe in person what exactly is going on to better tailor the plan. A veterinary behaviorist can also work on both medical treatment and behavioral treatment at the same time to make things less stressful for both you and Griffy. If he is attempting to break the skin while you put the leash on, refraining from doing so until you've talked to a trainer or behaviorist in person is best. You can find a list of local behaviorists in your area by checking out this link: http://www.dacvb.org/about/member-directory/

If this is a sudden or new behavior that happened out of the blue, and Toby is now biting and snapping when picked up or handled, I would be concerned that there is something going on such as pain or illness. Often times, a sudden behavioral change can indicate pain or another underlying condition. A good first step is to schedule an appointment with your vet to rule out any health issues that could be causing this. If Toby checks out healthy and he is still acting aggressive and trying to bite you or other animals, I would seek out the help of a trainer or veterinary behaviorist in person. Aggression is a very serious and complex issue and having someone there in person that can observe, assist and provide a tailored plan to help change Toby's behavior is best. Veterinary behaviorists are great as they are able to prescribe any needed medication in addition to a training routine to help create a safer, stress-free environment. You can visit this site to learn more about veterinary behaviorists and find one in your area: http://www.dacvb.org/about/member-directory/

I'm sorry to hear that you're having this problem! If this has been a fairly sudden behavior change for Elsa, the first thing I would suggest would be to have her examined by a vet to see if there may be a medial reason for the aggression - many illnesses including thyroid problems and neurologic issues can cause sudden mood swings and behavior changes like this, as well as anything that may be painful such as an injury of some kind, arthritis, etc. If your vet determines that Elsa is healthy, then I would strongly recommend making an appointment with a veterinary behaviorist as the next step. Aggression towards humans is a serious and complex behavior issue that needs to be handled by a professional who can work with your dog in person. The behaviorist will evaluate your dog and help you determine what is triggering the aggression, then put together a detailed training plan to work on the problem. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org

I'm sorry to hear that you're having this problem! Aggression is a complex behavioral issue, so it's often hard to give a succinct answer in this format. It would help to have more information about what kinds of situations seem to trigger the aggression, as well as some details about how your dog acts in other contexts. In general, I can tell you that most cases of owner-directed aggression like this are related to insecurity and guarding behavior over resources - like resting places, and sometimes food bowls or chew toys. Many of these dogs will bite somewhat unpredictably when lying next to their owners on a couch or bed. If you want to try and address this behavior, I would recommend making an appointment with a veterinary behaviorist who can evaluate your dog in person and help you determine what is causing the aggression, and also give you a detailed treatment plan to work on the problem. You can search for a behaviorist in your area here: www.davcb.org In the meantime, I would recommend avoiding situations that tend to trigger the aggression as much as possible - this may mean blocking Sam's access to the couch, bed, or other areas where he has tried to bite you. Punishment of any kind for this behavior is not recommended, as it tends to make the dog more defensive and worsen the aggression over time. Instead, if he growls or tries to bite, calmly walk away or call him to you for a treat to help diffuse the situation.

Hi there! I'm sorry to hear that you're having this problem with Buffy. It's not unusual for behavioral issues to take a few weeks to show up in a newly adopted dog - there is often a "honeymoon period" while they're still getting comfortable and adjusting to their new home, before these issues start to emerge. Aggression towards other dogs and humans is a complex behavioral issue that's difficult to address properly in a forum like this, but I can try to give you some general information that may be helpful. Treatment for aggression issues is generally based on identifying what situations tend to trigger the aggressive behavior - then either finding ways to avoid them, or working with the dog to teach her to respond differently using reward-based training techniques. If this is something you want to work on, I would recommend making an appointment with a veterinary behaviorist who can evaluate Buffy in person and help you put together a detailed treatment plan to address her aggressive behavior. For now, if the aggression only happens with dogs and people she doesn't know, I would recommend keeping her separated from visitors for now until you are able to get a more detailed plan in place to work on the problem. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org

Abrupt changes in behavior like this in dogs is very concerning to me. I would be worried about some underlying neurologic disorder that could be going on. If nothing has changed at home, her routine, or the environment in general, then I would suspect an underlying medical issue. I would recommend taking her to be examined by your veterinarian and possibly having some lab work performed so they can try and determine what is going on. Your vet may recommend further work up by veterinary neurologist or may recommend a behavior modification drugs like Xanax or Prozac. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.