I have two sibes and the younger one is becomming a problem. Hike is 15months old and i have been on top of him from a young puppy. Hike has a lot of stimulation through play, Heelwork to music, obedience and also worked on a scooter along side my 4yr old sibe (in the colder months). Hike is my baby but he really is not a spoilt dog as i have four in total and i am a dog walker so im busy all the time. My life is my dogs and i like to keep them happy.   The other day when walking in my local park where i walk my dogs a lot hike decided to go for a G.R and got very aggressive towards him. I got hold of hike as he was on a lunging rein and pushed him to the ground i told him off and he felt sorry for himself.  hike has been grumberling alot when another dog comes towards me but i just tell him to shut up and i always make a point of saying hello to the other dog.  Please help me in what to do im not sure wether now is the right time to get him done but i want a happy not aggressive sibe to love and treasure.