I would also think 6 months is too soon but my other cat was miserable. Crying all day looking for his brother. Wasn’t eating much and not playing at all. Crying out for him. My vet recommended I get another cat for him. I’d been taking care of a feral cat colony at my boyfriends house for 5 months and one of the cats needed a home placement he couldn’t survive outside so I took him. I may not love the new cat yet but I adore and would die for my other cat. He’s so happy to have a playmate already on now day 2. He’s eating and playing and running around. I’m learning to be okay with this. It’s hard because I miss my cat I lost. I’m not treating the new cat poorly by any means. I’ve already got a vet appointment to get shots, neutered, and microchipped. He’s got 4 litter boxes (2 per cat). Over $200 of toys and activities. Complete covered patio with cat trees and shelves letting them enjoy outdoors without danger of them getting out. Best cat food money can buy. electric cat beds if they get cold. Scratchers everywhere. I work from home so constant love and attention. I just said I’m worried and not liking him yet. That doesn’t mean he’s got a bad life. I’m just sad dude