Before I adopted Loca, she tested cat safe. When I brought her home, she tried to eat my cat several times. I tethered Loca to my waist with her leash whenever I was home so I could reward her when she didn't make eye contact and correct her when she did. She was muzzled when I wasn't home. It took over a month, but she and my cat ended up being best friends. It took a lot of work and absolute consistency, but it was successful. Can you do the same?