I have managed to create a mess. Until recently I had a 2 Doodle household. The two never had any issues with each other at all. My oldest dog suddenly fell ill with cancer and passed in the middle of Nov. At Christmas we were gifted with a new puppy. My remaining adult dog (soon to be four, neutered male, name Rusty) has never been good with small animals so we cannot allow them together yet but getting closer everyday. Right now I have a bigger issue. A friend brought me his 4 year old female Doodle yesterday and gave her to me. This was pretty much out of the blue. She is now a part of our household. I was not able to make the introduction on neutral ground so Rusty immediately wanted to jump her and fight. For now the new dog (Nessie) is limited to the hall and bedrooms blocked by a heavy gate. After 24 hrs Rusty pretty much ignores her and the gate but if they both come close at the gate (a foot or less) he jumps at her and now she growls any time he stairs at her. Other than that she is very docile. I know this is an incredible amount of change for Rusty and Nessie. I am going to start working more on Rusty's general training tomorrow just to assert my position as pack leader. Does anyone have any advice for me? I am stressed to the max. I absolutely love both dogs and certainly do not want either to get hurt. BTW, Nessie gets along great with the puppy both inside and out. I have a huge fenced yard if that helps with any ideas.