Both dogs are about 4 years old, they are quite aggressive, not really to humans but they need to establish dominance towards other dogs. One non-dominant male 1 year old who met both of them (one by one) got bitten, showed his submission and now gets along with the others. But if the two adult dogs meet, wht will happen? I am worried they will kill themselves. They are in a monastery, one has always lived there, the other just got there. There is no other option otherwise he will be put down. There is no option of having them in cages side by side, but they can be tied for a few hourse with long chains at the same spot in a way that they won't reach each other.