How Our Cocker Spaniel Reacts After Castration!

by Marlies Walker
(Paderborn, Germany)

Gorgeous Golden Cocker Spaniel Puppy

Gorgeous Golden Cocker Spaniel Puppy

We purchased our cocker spaniel 5 years ago from a breeder in Gieboldehausen near Göttingen in Germany. He was born on the 2nd September, 2005 as Pedro von Eichsfeld but is now called Olli.

Unfortunately, we didn't notice at first that he only had one testicle. We found out later through our vet, that the other testicle was growing inside of him.

Two months ago we visited our vet to have Olli checked over and to bring his impfung (injections) up to date. The vet advised us to have him castrated as the ingrowing testicle could later cause cancer. We agreed and the vet carried out the castration.

Poor Olli took weeks to get over it and seemed to be in pain for well over a week. My question is, we had always heard that after castration, a dog becomes much quieter, not so robust.

Now Olli was always very soft and friendly and was always excited to see and greet everyone, and actually still is, but the big change is that now on seeing or meeting other dogs he has become very aggressive and goes mad barking and pulling on his lead trying to get at the other dogs - he's almost uncontrollable.

He always had a mind of his own and we have never taught him obedience. We're both 66 years old and easy going. Since our children left home he is our one and only, but we are very worried about how he reacts when we are out and the fact that he barks constantly when he hears someone outside our house.

Since his castration he is a different dog, "is that normal"? "and can we do anything to get him back as he was" - any advice would be appreciated.

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Castration Reults
by: Tim Campbell

My English Cocker Spaniel was purchased from the Dullinger Breeder of Mettenhausen Germany. After taking the dog back to America, I found that one testicle was not where it should have been.

My local vet performed the castration but also removed a gland by accident. The dog was in much pain and it took weeks before he was out of pain.

As a result, this dog became scared to death of vets.

Fast Forward from 1996 to Sept. 2011. The dog, now 15 years old, developed heart failure (bad valve). He was given pills for treatment, but he often spit them out. It was very difficult for him to visit the vet. Then, he started screaming in the car on the way to the vets. I ended up bringing him home where he died a couple of days later.

So, I am not sure that I would castrate another dog. He lived a very peaceful and quiet life until he had to go to the vets.

I am now looking to purchase a red male English Cocker Spaniel in Germany. If you know of a breeder, please contact me at

by: Anonymous

Our dog was castrated but it didn't really change him that much.

If anything, he became better at meeting other male dogs.

Previously, when he met another male dog on a walk, he would become fairly dominant and aggressive. He wouldn't start a fight but he would growl and if the other dog started - he would try to finish it!

We feel that this change was a positive outcome.

Yes, he was in pain for a week or so, but I think that's normal in the circumstances.

Overall, our cocker spaniel's personality doesn't seem to have changed. He's still the same, sweet scaredy-cat dog that he's always been!

Unfortunately, one of the down sides to castration, he lost his beautiful silky coat - he now looks like a teddy bear!

So, to answer your main question, no, I don't think the aggression is normal.

Perhaps you should speak to your vet for advice?

Or a dog behavioural therapist?

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