Adopted out a cat from a litter and 10 mins later, they want to return him
Edit: 10 MONTHS
First off, I offered this, but didn't expect to get him back that much later.
We adopted a litter of 3 in Sept when we found them. They were about 8 weeks old. I adopted 1 of them out to some college kids at 11 weeks old, and now fast forward to now, the owners want to return him.
Do littermates remember their siblings? They haven't seen him since Oct 2025.
Do I treat him like a new, stranger cat?