I am in the process of trying to introduce 4 new adult males to my 3 males I've had for a while. I'm very nervous because although my boys I've had are older they are smaller and double rex with barely any fur. These new boys are a little younger but they act more dominant over each other and rowdy, and are much larger. Today I introduced one of the new rats Eeyore to my older rat Dobby. It was only for about a minute it went well except for the fact that Dobby was terrifed. What are signs I have to look out for during introduction that there might be an attack coming? I'm very nervous of the fact that Dobby was terrifed because he is the alpha male of his pack.