2 former friends don't see eye to eye anymore
my story is quite complicated, but I hope some of you here might have some similar experiences and can help me. I’d be very helpful if you could give me some suggestions.
We moved to this new place where we live now and as soon as we did so, a neighbour cat became our friend. Her name is Sheilla and she used to stay with us every evening, I used to feed and pet her, even allow her in the house. We have a special bond and I value it even greater because she chose to hang out with us in the first place.
At the same time, a grey stray was venturing though our yards and we’ve noticed she was eating Sheilla’s food and was even resting on the neighbour’s deck with her. The neighbour couldn’t stand the stray and tried to chase her off a few times, but she kept coming back. She was shying away from people and seemed to like the company of the other cat better. After a while, another neighbour found 3 kittens in her shed and she set a trap to catch the mother of the kittens (no surprise, the grey cat was their mother. A day later I found the 4th kitten under some ferns in my yard and I took it to the SPCA to be reunited with his mother and brothers. When I visited the kitten I found, the mother seemed very friendly and immediately rubbed against me, so I thought she’d make a good pet. Because the kittens had better chances to be adopted, I thought even more so on adopting her. I took into consideration the fact that she was a young cat (about 1 year old) and aware of Sheilla with whom she shared the territory, so I thought this would go on if I adopted her. After she got spaded I visited her couple of times and she was the shyest cat there, always hiding under blankets, but she would come out if I interacted with her. And this is how she became my Modra.
Surprisingly she went over the first shock of being in a new house extremely quickly. She must have recognised her old territory and the next day she was already outside, playing and again to my surprise, she returned to the house and came to me to be stroked and sleep on the sofa as if she had this since forever. Sheilla was very curious about her; I could see she wanted to stay with her; she was always around her, although very confident and relaxed. By contrast Modra was very reserved and kept her distance. All went relatively well until Sheilla ate from Modra’s dish. I saw an immediate change in Modra. I took Sheilla away from her food and fed her separately. Sheilla started to rub against me and Modra became even more distressed. Then they started yowling and grinning and now Sheilla ran away. Modra seems to see part of Sheilla’s yard as her own as well and she even chases her there. Sheilla still visits during night, but it’s a true drama. Sheilla is twice Modra's size, but not as fast as Modra so there is a sort of power ballance between them and they are both afraid of each other. Modra is much calmer during Sheilla's visits if I am around too and I speak gently to both of them, but Sheilla is too scared to linger around for too long.
Is there anything I can do to make them friendlier with each other? Should I even intervene in their business? Your advice would be very appreciated.