I have two bitches from the same litter aged 7, unusual giant cross breeds from puppies that we adopted when living abroad. They are both approx 50kg each. Now I know adopting two bitches from the same litter is a bad idea, but didn't at the time.
Generally, herd defending breeds are difficult dogs that require experienced confident handling. I have been a dog owner all my life and had several herd defending dogs but these have been the most challenging.
One of my bitches will attack her sister, usually over food competitiveness with little warning and when they fight, they fight to kill. Their jaws lock onto each other's muzzles and throats and they can only be separated by dragging both dogs backwards by the hind legs at the same time. It doesn't happen often but when it does, it's bad.
They've never fought when there has been only one person present, and I have no idea what would happen if they couldn't be separated, I think it's possible that they would fight to the death.
On Christmas day, my bitch attacked her sister, resulting in my DS getting bitten through the finger and on the elbow as he got caught in the crossfire. This is the third fight where a bystander has been injured and both dogs are pretty torn up. It's a serious injury for my DS, with possible long lasting tendon damage.
Separating them would be ideal but the unpredictable bitch has a bite history so can't be rehomed and we don't want to part with the other bitch as she has done nothing to deserve it.
We have an appointment at the vets to discuss options but I'm leaning toward putting her to sleep as in all honesty, I'm scared of what she is capable of, which will break our hearts as she's been with us all her life.
Any advice?