I have an older (altered male) Golden who has medical (seizures as well) issues. My GSD was raised with him. They were best buds, until my GSD was around 3. One day out of the blue, the Golden attacked the GSD. I was there, it was unprovoked. I thought it might have been a mental issue with the Golden. However, that was over a year ago and they will even fight fence and window fight. They hate eachother. My Golden is no match at all for my GSD. So they are carefully seperated 24/7.
I have a large yard, a large dog run and an outside kennel. I have a large crate in the house. The Golden wants to stay in the outside kennel. So when I am not home, he is secured in the outside kennel. When I get home, he is released from the kennel - he'll wander around, potty and then go back to his kennel. It makes it eaiser for me since he seems to like the kennel.
This has taught me that anytime you have more than one dog - of any sex - make sure you always have a Plan B.
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