We had two kittens, brother and sister, who loved each other very much and were thoroughly bonded. They played together all the time, slept together, washed each other etc etc. You never saw one without the other. They are 6m old.
The girl kitten had a horrendous accident - she fell out of an open window and broke her back. She had to be put down.
The boy is now bereft. Although he is eating / drinking / playing etc, it is clear that he is missing her desperately.
Should we get a 'replacement' girl kitten for him? The added complexity is that the boy will be going outside in April / May (10m ish). We don't want a brand new baby (8w) kitten which will only be 4/5m at this point (un neutered, no brain cells, don't want them out on the roads until they're older). So it would ideally be an older kitten of the same age as our boy so that they could both go out together.
Will there be issues with the two of them getting on? Would he be better as an 'only' kitten? How do we try to replicate that relationship he had with his sister or is this just a 'human' thing and the cats will decide themselves?
Has something similar happened to anyone before, and what did you do?