Labrador retriever aggressiveness

Question
My 3 yr old lab is a good dog, very playful with a lot of energy.  Lately he has shown aggression towards anyone who enters our house; his hair stands up, he barks and jumps at the person, but does not bite.  Will neutering help this behavior?

Answer
Yes neutering should make a big difference once there is time for all the hormones to work their way out of the system.  combined with better leadership, it should solve the problem.

The key to most behavior problems is approaching things using the dog's natural instincts.  Dogs see all the people and dogs in the household as a pack with each having their own rank in the pack and a top dog.  Life is much easier if the 2 legged pack members outrank the 4 legged ones.  You can learn to play the role of top dog by reading some books or going to a good obedience class. A good obedience class or book is about you being top dog, not about rewarding standard commands with a treat. Start at http://www.dogsbestfriend.com/  For more on being top dog, see http://www.dogbreedinfo.com./topdogrules.htm