Shadow (tuxedo) and Spike (tabby) are birth brothers I brought in when they were just wee babies when it was discovered their original adoptive mama was allergic. They're 6 years old now and have never left each other's side. Brothers to the end.
Shadow likes to rough-house. Spike is more relaxed.
Toilet paper. They seem afraid of it.
Fresh meat (cooked and cooled). Spike loves milk while Shadow couldn't care less. Very little is given, but Spike will have it all while Shadow watches.