Here is an udate from Zinc and Coco (nee Ginny and Gracey-Lee) who were adopted in January 2015:
We adopted Coco (tortitude) and Zinc (fluffy grey element) in January 2015. They are sisters from the same litter who used to be very close but in their teenage years sometimes slapped and hissed at each other. So we have trained them to touch noses and be nice in exchange for cat treats. Zinc is a full-time lap cat. Coco is a more independent outdoor cat but also very affectionate and completely devoted to the youngest member of the household.