Hey! So I should note that my cats are primarily outside but used to come to my room a lot through the window during winter. They’re both females: Ruby and Poppy. Poppy is a month or two older and acts a lot dumber, while Ruby is mischievous and often too smart for her own good. They used to wait at the window together, come into the room together, and even sleep next to each other. They have never fought before, not even hissed or growled at each other.
About a month ago, Poppy got attacked by some animal and had a wound on her head near her eye that got infected. We had to take her to the vet multiple times, and she had to wear a cone for about a week. Ever since then, Ruby has started absolutely hating her. They can eat together and be outside together, but whenever they’re in a closed space like my room, Ruby growls and hisses, her eyes are completely black, and she curls into a ball in a corner.
I don’t know how to fix this. I can’t take them both inside when it’s cold because Ruby will react badly. Poppy doesn’t seem to care that Ruby dislikes her being around; she keeps doing her usual activities. Would it help if I took only Ruby inside first to get her used to it, then added Poppy? Or should I wash everything that smells of Poppy? Any advice would be appreciated!