My Boarder Collie / Spaniel mix (female) has been with us for 4 years. We added a miniature Schnauzer (male) last year. I believe we have a dominance issue. Oakley (Schnauzer) constantly nibbles Annie (Spaniel) and is extremely jealous of her. Not just of our petting of her or paying her attention but of anyone that comes over and pets her. I think Annie thinks she is the dominant one, but Oakley doesn't agree. She is getting more and more aggressive towards him when he is aggravating her. They DO get along some of the time. They are both allowed to sleep in our bed and have free range of furniture. Oakley is kenneled during the day while we're out, because he chews shoes. Annie is left out, because she always has been and is a very good dog. (So is Oakley - very easily treat trained) BUT Oakley has begun urinating on MY BED!!!! He usually chooses the spots that Annie frequents. (The foot of the bed and one pillow in particular) - it's definitely not a bathroom issue - he is making a statement!!!! How do I deal with this and how can I help them know which is the dominant one - it's hard for me to tell sometimes. For instance, Annie will definitely put Oakley in his place (has even made him yelp) if he gets on her nerves too much, BUT Oakley is very bossy and seems to show more dominant tendancies.