Hi all. I adopted a male (5y) cat (Loki) for my female (4y) cat (Delphie) back in September 2025 for company. When I’m not working from home, I spend the majority of the day at work (12+ hrs) and since Delphie grew up with a male cat (now deceased) I figured she would enjoy the company. I went to the shelter and saw Loki, who’s story made me choose him – he had been in the euthanasia list until the shelter rescued him and had been adopted 2-3x but returned due to some other excuse (allergies, not getting along with a dog, aggressive behavior). The latter seemed due to high energy requiring dedicated playing time. I knew it would be difficult but decided I should try. Brought him home, took the time to introduced them, Delphie initially very antagonistic until she was indifferent if not approached. Everything seemed ok until he started wanting to play with her. These interactions didn’t last long because she would shoot him down. She started hiding more often, not going to shared living spaces knowing he would be there, so much so she would spend hours of the day in one spot. I thought it would just take some time. In the meantime, I was able to manage his aggressive playing behavior by dedicating time to him (at least twice a day). This past month, I moved them and myself to another city for work for a month. Obviously not in their space, it seemed things were a bit more tense. But nothing Delphie didn’t seem she couldn’t handle. Until I noticed she was peeing herself. She did it twice in the new place. Today, we finally moved back home and I was dedicating myself to his playtime but also set up in the kitchen a toy Delphie likes to play with (he doesn’t like it). I tried distracting him but he was bent on going to see Delphie. I couldn’t stop him and he ended up grabbing onto Delphie and not letting go. Taking clumps of hair, and when she would finally get away, he would follow and do the same. I tried stepping in between and finally got him away from her but I noticed she had peed. I placed him in another room with all the things (food, water, toys, litter, bed) to give them space. She’s terrified, and I’m so sad for her and for him because idk what to do. I think the best option is giving him back to the shelter but I’ve grown to care about him these past few months and hate the fact he’ll be back in a cage waiting for who knows how long for someone to try again. But I also don’t know if I have the money for training.