- Introduce them to each other slowly, don't force them to get too close to soon.
- Supervise them at first as you don't want them to scratch each other.
- Give them separate spaces within the same room while they get used to each other.
- Comfort both kittens equally during the transition.
- After a day or two leave them to play freely together if they seem comfortable together.
I am pleased to say that Muffin and Poppy are now best friends. Happy endings do happen in real life after all!