I am a bit sceptical about her saying they had already decided on this puppy before Coco died, in an effort to keep Coco young,
she would have mentioned that in her daily updates, she should have said nothing instead of trying to justify it, it all sounded a bit implausible. I think some of her followers have been reaching out to her, it seems one of them randomly offered her a photo shoot, so I wouldn't be surprised if someone reached out to her with the offer of a puppy.
It is a really cute little thing though, although that puppy stage is not easy.