Two dog household, Dog on Dog aggression

Usually when there are two dogs in a household they find a way to co exist with as little conflict as possible. This peaceful co existance usually takes a lot of work on the part of the human guardians.
Sometimes there is dog on dog aggression between the canine members of the household. In most cases this is not continious as the humans intervene by showing the dogs that this is undesirable behaviour.
The reason for this dog on dog aggression is simple, the dogs are competing for desired resources. These resources could be food, affection, a specific resting place etc. In a two dog household one dog is usually more dominant than the other dog. The human guardian needs to recognize this. The usual prescribed procedure is to feed the more dominant dog first, pet the more dominant dog first.
However when this aggression or competition for desired resources continues there are ways to show the dogs that this is unacceptable and will not get them the desired resources.
First, the dogs need to be separated so that they do not harm each other. Once separated time out in individual crates for about thirty minutes to an hour without any attention is the best way of handling the situation. Once released from the crates the humans should not fuss over the dogs, but simply open the crate doors and go on about their business. If the behaviour persists then repeat the time out until the dogs learn that only good behaviour gets the desired results.
As well as separating and giving time out, having the dogs on a schedule is very helpful. Dogs like it when everything in their life is predictable. As a rule dogs do not like change.
Feeding on schedule and walking on a schedule gives the dogs a sense of security. This sense of security is interpreted in that things will happen at certain times and there is no reason to compete as the food will appear at a specific time every day and walks occur at a certain time. Dogs do seem to have a built in clock and know when things should be occurring.
For dogs that feel they need to compete with each other for desired resources, free feeding is not a good idea.
As well as the above, it is important that dogs living in the same household who show aggression towards each other are never left alone unsupervised.