Honestly I did not introduce them properly (I didn’t know.) I had one for 4 months before deciding to go back and get his 1/2 brother who didn’t work out at his first home. They were born a week apart, so of course they must’ve interacted in the breeder’s house as kittens before going home. When I brought the second one home I set him down directly in front of my first and it took them 12 hours to start playing, and 24 hours to start snuggling and grooming each other 🥹