This morning I got to work to find the most adorable cat guarding the front door at my job. I fed him and gave him some water and he stuck around all day so I decided to take him home. I was told by a coworker that the cats owners moved and left him behind. He's very sweet and he crawled up in my lap and just wanted some love. I have never owned cats before but Ive somehow managed to acquire 3 (now 4) all within one year. Snape (intact male outdoor) was living on the property when I moved to this house a year ago. Petunia (intact female mostly outdoor) appeared on our farm about 6 months ago and loves to hang around Snape, they get along well. Last but not least, Minerva aka Baby because she's my child (intact female inside only) So I brought this new male cat home hoping he would get along alright with Snape. Snape ran right up to him and they just smelled each other and then sat in the shade beside one another. I monitored them for several hours and things looked alright! They napped practically on top of each other and then ate dinner out of the same bowl with no problems. I came inside at around 10:30 and about 30 minutes later I hear some gnarly sound outside my window that can only be described as a fight. I went outside to find new cat way way up in a tree and Snape at the base of it and tufts of new cats fur on the ground. I coaxed him down from the tree and I opened up our garage door and he happily came in to spend the night. Is there any possibility of them getting along so I wouldn't have to separate them? I don't want new cat to feel stressed here and I would feel awful to take the angel to a shelter. Sorry for the super long story just wanted to be as detailed about the situation as possible to get the best advice!