10 month old male

Question
We have a ten month old sheltie and we would to have him father at least one litter. He seems to be good at home but if we take him to visit family he  marks couches and other furniture  what can we do to resolve this  

Answer
Why?  With the severe problem we have with excess dogs being slaughtered, what good reason do you have to let him add to it?  The problem with him marking other people's house could be at least partly genetic.  Why chance letting him pass the problem on?  All breeding stock needs to be carefully selected.  Dogs with any health or behavior problems don't make the cut.  They get the snip.  

Neutering is no cure all, but usually helps in such cases.  The other thing is to give him strong leadership.  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/

The best answers come from people with successful experience solving the problem.  I have never seen the problem in the carefully bred, intact males I see.  I don't even remember any questions about it in the training and problem solving meetings I attend. It is possible a professional dog trainer or dog behaviorist might be more help.  

I still say the best solution is to forget about a litter, and neuter him now.  Certainly any breeding needs to be put off until you fix the problem one way or another.