For context:
I currently have the following animals in my home
- Frankie: 6-year-old male terrier mix dog / neutered / rescued at 6mos old
- Cora: 2-year-old female cat / spayed / rescued at 6 mos old from the street
- Clementine: 1.3-year-old female cat / rescued 5 days ago / will be spayed next month
Frankie is my first animal. He's a dog, and he loves everyone. When I introduced him to Cora about a year ago, they were fast friends. Cora was a bit timid, but there was never any hissing, violence, growling, nothing. She absolutely adores him now, rubs up on him, tries to play with him, etc.
I recently got Clementine, a new cat. She's been set up in my office since Monday and has settled in SO quickly.
Originally, before either Cora or Frankie even saw her, we did scent swapping with a blanket Clementine was lying on. We also did feedings by the door.
Frankie: couldn't care less
Cora: Intrigued but clearly fearful (would run away and hide)
I worked up to doing a private intro with Frankie and Clementine since things seemed to be going well. Frankie originally was doing super well but then was smelling Clementine's rear end for too long, which caused her to hiss at him. But he backed down. I'm not really concerned with them because Frankie is really good with set boundaries and tends to keep to himself once he's gotten a good sniff.
The biggest issue seems to be between Clementine and Cora.
Last night I had the door open with a baby gate up after Cora repeatedly went up to the gate out of interest and wasn't running away. I actually had them both playing with a teaser feather toy on opposite sides of the gate. Then, Clementine hopped over the gate which scared Cora, who then growled and swatted at Clementine. I quickly separated them and put Clementine back in my office with the door closed.
Today, my husband and I are both working from home, and unbeknownst to me, he left the office door open. Cora got inside, and I found Cora and Clementine nose to nose, with Clementine growling and hissing.
I'm so disheartened. I feel like I'm failing them both. Individually, they're two of the sweetest cats, and I wanted them to be friends, and I feel like I've messed things up beyond fixing.
I don't know how to move forward. Is this salvageable? I don't want to make either cat uncomfortable. I just wanted them to be friends.
Any and all insight is deeply appreciated. Thank you.