Dog Training Questions

Steven asks…Stray male dog with aggressive attitude toward other pet.?I took in a male unaltered stray dog. I have had him for about 11 months, about three weeks ago he attacked one of my other dogs, male neutered dog. This has nevered happened before. I have two other male dogs (inside dogs all three of these) also neutered that he does not bother. Figure it is an alpha dog thing going on... He also stays outside with my other outside female spayed dog, and they get along fine, might be

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