Should i have my papillon neutered?

i have just got another papillon from a breeder to replace my previous one that passed on and he is 6 yrs old and i wonder if i should have him neutered. He was a show dog and was bred from. I have had him 2 days and he has marked his territory on the carpet and hard floors 3 times, so it could be a settling in thing, if neutered would it make him any worse, regards john