We have a new cat (which I took in from my brother as she wasn't getting on with his dogs - he had her for about 8 years). I already have 2 existing cats that I've had for about 13 years. My new cat and existing cats don't really like each other, but nothing more than the old growl here and there.
We've been letting her go out for the past 6 days. No problems, she was always coming back, although sometimes she'd be out for quite a few hours. Now, the last time I saw her was Friday night. We have a cat flap so she could have been in since, but I don't think she has. We were busy decorating yesterday so I spent most of the day upstairs, so she may have come in but, as I say, I don't think she has. It's now Sunday and no sign of her.
She's about 8 years old. My brother who we got her from lives about a 10 minute walk away. Is it likely that she would've gone back there? I felt like she'd settled her. She was wandering all over the house, coming for cuddles and everything. Should I be getting worried yet?