the yellow lab

Question
I had a black lab also nuetered and had a good home.  he started to attack my dastchund and draw blood and become very aggressive.  this was my dog and sometimes i think my husband thought i loved him more than him.  i had no choice but to find him another home (i have children) and tell the new owners do not own any other pets.  why is it labs are starting to become so mean this is not the loving breed we all know.  is it from inbreeding and bad genes?  

Answer
I really can't say.  Early socialization, and by that I mean before 12 weeks old, is very important.  Poor socialization may not show up until the dog's personality reaches maturity at 3 years.  Breeding can make a big difference, although litter mates are often far different.  My Prince was a royal pain.  My friends had his brother Dawson, who was much more mellow.  

There is also some subtle ways for one dog to challenge another.  the Lab may have been responding to aggression by the dachshund you didn't catch.  Doggy    your mother wears combat boots.  I once saw a neutered Husky challenge an intact Lab that weighed twice what he did.