MY TWO DOGS FIGHT A LOT, AS IF EACH IS TRYING TO BE
Dogs sort out a natural pack hierarchy between themselves and it is important to support this. Favouring the dominant dog over the other will help to achieve an equable balance - for example, feed and give attention to the dominant dog first.
Remove items, such as toys and bones, that they are likely to have disputes over, and ensure both have their own bed and personal space to retire to.
If the dogs are both of the same sex, it can help to have one neutered.