I have a Scottish Terrier - Cairn mix named Scruffy, and my new roommate has a Collie named Lily. Scruffy's been fixed, Lily will be spayed. My new roommate, Brianne, will be moving in at the end of this week. My problem is, Scruffy has been isolated from other dogs for most of his life - not really because of anything, but just because he's a house dog and doesn't like car rides to places where he can meet other dogs. ANYWAY! Bree and I tried introducing the dogs yesterday, and Scruffy was VERY aggressive, tried to attack her (I was keeping my hand on his collar the entire time). Barked up a storm, and so on. I remember the last time, it took him almost an hour to chill out and start seeing the new dog as a new friend. I didn't time it yesterday, it was probably about 20 minutes, and we introduced them outside. Any advice to make it easier? Both dogs are about 5 years old, Lily has a more sensitive disposition, and they do have similar personalities (both are lazy and likes to lie around vegging) so I know that they would get along just GREAT. Now if only Scruffy would see that and give her a chance! During the introduction, Lily was kind of backing away, crying and being very subservient. Did everything but put her tail between her legs and lie down and try to expose her belly. So... HELP!!!