Dog aggression

Should you give a second chance or work with a dog who you raised thats start to show signs of aggresion?

Or the right and healthy thing is to put him down.

i see lots people i know from adoption agency are totally against Euthanization and would rather work with the dog..what is your input on this?..

Honestly it really depends on the skill and knowledge of the owner/handler and what is causing the aggression.
Some types of aggression can be controlled and modified or even eliminated. The biggest factor or determinate is what is generating the aggression.
For instance a lot of problems owners have with their dogs stems from lack of leadership. When the human is not the leader the dog will gladly take up that role of leader and all that goes with it.
Thankfully this type of aggression is easily dealt with by either the owner stepping into the role of leader or by placing the dog with a more assertive owner aka natural born leader.

I agree with Linda, but have to add that some people don't know the difference between dominance and aggressive. This breed is naturally more dominant than most and that can cause issues with multiple dogs.