Why is my dog aggressive after pyometra surgery? Is it normal?

There are lots of possible causes, but the most important one could be pain. I would consult with your vet and make sure her pain medications are all at the best doses for her currently. Alternatively, she could be developing some resource guarding. She has gone through a stressful procedure and she may be feeling more sensitive and protective of herself and her spaces. For now, I would keep the puppy away so he doesn’t get hurt. This article may provide more insight: https://veterinarypartner.vin.com/default.aspx?pid=19239&catId=102897&id=10464193

A bitch spay is a big operation and it takes a dog a good while to settle from it due to the pain and anaesthesia. This could certainly have put her out of sorts. I would give her another week or so to settle and if she is no better then, it may be personality clash and would be best to speak to s behaviourist.

Arya has been through a lot this week so I would give her a little time as she will still be very sore and disorientated from the anaesthetic. She may need a stronger painkiller so you could ring your vet. If the aggression continues over another week, I would contact an animal behaviourist before it gets out of hand.

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question. No, this isn't normal behavior after spaying, and spaying doesn't cause aggression. It could be Clementine saw something at the vet that upset her, and she redirected her aggression at your other dog when she got home. I'd keep an eye on her for now, and if this behavior continues, I'd take her back into the vet. Best of luck.

How long ago was it when she was spayed? If it was very recent, is she on pain meds? If not then I would recommend discussing this with your veterinarian and see if they can put her on some type of pain medication. If it wasn't within the last week then it most likely has nothing to do with pain related to the spay and there may be something more going on which would require a vet visit and potentially a trainer. Thank you for using Petco Pet Education Center, formerly Petcoach.

Poor thing. My two top would be that he was really sore before and/or after the surgery and remembers that being traumatic. Fear-based aggression is very common in dogs. Your comment that he seems worse than before the surgery makes me think perhaps he never loved having his feet touched, and if that's the cause, having an injury could have caused him to think "see, I was right! awful things happen when people touch my feet!" even though I'm assuming the injury itself was unrelated to a person. Since he's gotten to the point of biting, I would recommend talking with his vet about some medications (such a prozac and/or trazodone and gabapentin) to help him calm and then working with a very qualified trainer on desensitizing him to having people touch him. I would also recommend never letting kids interact with him until he's more comfortable, so that no one is in danger. Good luck with this very difficult problem.

Hi there. I am glad Cookie is doing well after her pyometra surgery. It sounds like she is having some pain after the surgery. That is most likely the reason why she is snapping. Did they send her home with pain medication? If so, be sure she is taking it. If they did not, please call the vet clinic where she had the surgery and ask them for some pain medication for her. I don't the will have any problem dispensing some to you. I hope this was helpful. Best wishes! Dr. Amber