Why is my dog suddenly aggressive, anxious, and barking excessively?

I certainly sympathize with your situation. Since Digby is 7 years old and this is a new behavior, I would start by having your veterinarian examine Digby to make sure there isn't a medical condition that is contributing to the change in his behavior. Your veterinarian may recommend trying medication depending on Digby's situation and behavior. If everything is normal on examination, ask your veterinarian for a recommendation for a behaviorist or trainer. You will need to commit to a training regimen to change Digby's behavior when he sees another dog. This can be a long process, but will be worth it. Good luck! Thanks for using Petco Pet Education Center, formerly Petcoach.

If this is a new behavior, it could have one of several causes. I would first have Boozo examinede by the vet to rule out any physical condition. If he is healthy, the problem is behavioral. We would need more information to help you with this. You can click on the prompt to initiate a consult where we can discuss this in depth.

There are many possible reasons for this, I'm afraid - aggression is a complex behavior issue, so it can be hard to provide a succinct answer in this format. Many dogs develop aggression issues related to fear or anxiety around the age of 2-3 when they reach social maturity, so it's possible that this may be the issue. Or, since I see that Chucky is a bit older than that, he may have a medical problem causing him to be painful or uncomfortable - this is a common reason for "new" aggression in a previously friendly dog. I would recommend having Chucky examined by a vet as a good first step - he/she can check for anything that may be causing him pain or making him not feel well, and get him started on treatment if needed. If everything is normal medically, then it would be best to make an appointment with a veterinary behaviorist to help you determine what is causing the aggression - he/she can observe your dogs in person and also give you a step-by-step treatment plan to work on the issue.

Hello, Duke may be hearing or sensing something that could be causing him to be alarmed. If nothing, then make sure Duke did not get into any medications at home that could alter his mentation. If this does not change and he continue to show this behavior then have Duke evaluated by a veterinarian soon. I would have Duke evaluated tonight if his behavioral changes worsen or if you note any other signs including weakness, lethargy, vomiting, diarrhea, or worsening aggression. Hope this helps and best of luck.

Hello. Any sudden change in behavior, especially in a senior pet, is worrisome. This may be a neurological problem, like early onset cognitive dysfunction, or the beginning of a loss of senses ( hearing, sight ) that may be causing his reaction. You really need to have Buster fully evaluated to see if there is a medical reason for this strange behavior, or if there is a medication, diet change, treatment or behavior modification that might help. I am sure if there is a need for any treatment, a method to get it into him will be found, or perhaps a consult with a behavioral specialist should be tried first. Hopefully, you can find a solution to his distress. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

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.

If separation anxiety is suspected, the first step is to discuss the situation with a veterinarian and have the dog undergo a complete physical examination. It is important to make sure that a dog's behavior is truly due to separation anxiety and not from something else. For instance,a dog may bark when alone because he feels he is protecting his property or because he can hear another dog. A veterinarian may recommend some testing to determine if a dog has an underlying medical problem, which could contribute to behavior problems or make them worse. This is important considering he is suspected to have developed anxiety recently and quite suddenly. Tests may include a complete blood count (CBC), a chemistry panel, urinalysis, thyroid testing, a blood pressure check, and an electrocardiogram (ECG). These tests will also be important to evaluate the health status of a dog prior to being placed on any medication.