If you manage to kill the dog or escape with no injuries then this will denote that you will escape all harm at the hands of an enemy.
To see someone else kill the dog means you will have a staunch supporter. [1]
2. If one kills the dog, then the unknown adversary is vanquished.
3. If running from a mad dog, one is unable to cope with an adversary.
4. If someone else kills the dog, it means that the dreamer has a good friend who will come to his/her aid. [2]
To dream that you kill a mad dog indicates that you will be able to defeat your enemies and gain wealth and status. [3]