My pug is aggressive to our baby. Is it a brain tumor or behavior?

The sudden temperament change can be due to stress from a new baby or maybe an indication of pain or a neurological problem such as tumor or dementia. You can talk with your vet about medicine for pain but with a new baby it is probably safest to not chance it and always keep them separate. If the medicines do not help and her behavior continues then I am afraid your only other option is considering euthanasia for everyone’s safety. I am so sorry you are faced with this!

It is never good when a dog is aggressive, especially not when they actually do damage. I would highly recommend seeking the help of a professional behaviourist to assess the dog and help you with a training plan.

You need to take him to a vet for an exam. Any abnormal behavior, especially towards the side of aggression, need to be taken seriously. It very well could be a brain tumor. I don't know. It could also be the beginning stages of seizure activity. It could be from pain somewhere in/on his body. He needs a vet exam to try to find out what is going on with him.

Oh goodness. This is a big question. You may want to consider a visit with your veterinarian or a veterinary behaviorist. As a veterinarian and a mom I can tell you that is pretty easy to keep them separated the first year of baby’s life, but as they become more mobile the next several years are hard. If you have a dog who as a low bite inhibition, meaning he has already proven he will bite, then the likelihood that he will bite a child is high. Other options are to keep them separated 100% of the time (near impossible in my experience), or to keep a basket muzzle on him any time he has access to the children. I also encourage you to consider the size of the dog - and how powerful and destructive a bite will be to a small child. I have been in your shoes and it is a very hard decision to make. I have also been the mom of the child who was bitten. I encourage you to always put your child’s safety above all else. If you want to discuss this further I would be happy to consult with you. Take care.

Canine aggression is a complex behavior as it can stem from dominance, possessiveness, fear, anxiety, resource guarding or a combination. Most people are not capable of correctly interpreting dog body language. For that reason, your best option is 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. Best of luck.

It would be unusual for this to occur secondary to a bump on the head, but it is possible to see personality changs with major head trauma. I would recommend having your vet examine him again to look for signs of neurologic problems. Your vet can also refer you to a behaviorist who could help determine whether or not this is simply behavioral and unrelated to the accident.

You have to do what is best for your family. All dogs, whether trusted or not, should always be under direct supervision around babies. I would recommend that you have Jack evaluated by a veterinary behaviorist. The vet will be able to help you work on behavior modification and give you guidance on what changes need to be made before the baby comes. Use this link to find a veterinary behaviorist near you: https://www.dacvb.org/search/custom.asp?id=4709