My Rottweiler does not bark, how to make hom little aggressive?

Rotties are powerful intimidating dogs and they can be excellent guard dogs. Not all dogs are same they all have different characters. What u need to understand is that when it needs to be angry or in protection mode he will be. IF u want that your dog should become aggressive and bark at strangers then from now on if anyone enters your house (a stranger that he doesn't know) isolate him, don't let your dog meet him or greet him. This will create friction and he will get aggressive at strangers and bark at them if you do this 20-25 times but be aware that once he s de-socialised he can become pretty dangerous. And for the other dogs don't do anything now let him soak it in he will himself understand everything once he gets older

Debojyoti Sarkar, please remember, you have kept a dog, an animal, not a loaded pistol!! Not being rude or anything...
You expect a 6 month old dog to be aggressive?? your dog is still undergoing the growing stage wherein you need to be more focused towards his overall development, like socialisation, dieting, exercise, training, vaccination...
Your dog will become bold and confident on his own if you do your homework as a pet owner. Expose your dog to different situations, like take him near busy road, let him play with other dogs, allow him to experience different people, animal..your dog will become mature on his own..
The tendency of being protective in dog comes very naturally in dogs and their is no so-called technique to develop this tendency..Even a pug will try to protect his family if he feels it's in danger..
When it comes to rottweiler, one should remember that these dogs ARE POWERFUL AND THEY DON'T HESITATE TO SHOW THAT POWER..An untrained and unsocialised rottweiller can extremely be dangerous and fatal..
AND ONE SUGGESTION, IF YOUR AREA IS FREQUENTED BY THIEVES, IT'S BETTER TO KEEP SECURITY GUARDS AND INSTALL CCTV CAMERAS...

thanks a lot ...ok i got it ,, but should i take him before other dogs as other dogs come chasing him and he gets scared.taking him outside now at this stage wherein stray dogs are there is inducing fear/phobia in his mind . so should i stop exposing him to stray dogs till he grows little more. please suggest ...

Debojyoti Sarkar, I would suggest you not to let him socialise him with stray animals because as you said, they are wary of him and are likely to attack him and there is a risk of these dogs being infected with Rabies. So let him socialise with only vaccinated dogs.
Always carry a thick stick with yourself when you take your dog outside. Some stary dogs can be notorious and can attack your dog without being feared of humans. So, to scare them off carry a broad stick with yourself.
Right now, your dog is still a puppy and he is still learning to protect his territory...he will learn this only over time and you being a parent has to infuse a lot of confidence by helping him socialise with different animanls and people...Over the period of time, you will find your puppy has grown up into a confident dog....so have patience..

Hello Deb,

I hope by this time your Rottie pup has grown well.

Stray dogs cannot be avoided. They are very territorial & do not appreciate a new dog within their territory. To overcome these stray dogs, either let the bluecross know or when you take for walks, take a stick with you. Holding a stick in your hand - enforces you to be the pack leader. Of course, stray dogs will still come, but there will be a little hesitation in them. When they come near, ward them off using the stick. The dogs will go away. Upon the usage of the stick - the situation will come to control, but it will take time.

I live in a similar situation here. I have a lab & a Golden. Although there is no issues of thieves, but every street that I can possibly turn to, there are a minimum of 5 stray dogs who look on me and my dogs as predators. I walk with a stick in hand & I enforce it when needed. By doing this, my dogs see me as a pack leader & also trust that I will take care of them & there is no need to fear.