I have found that in the past when I introduced a new kitten this procedure is done very slowly. Keep the new guy isolated from Jake and just let him come out slowly. Make sure your Jake gets tons of attention. My seal point Siamese (now at the Rainbow Bridge) took forever to get used to a new baby. She stayed ontop of the fridge for a good ten days. Jake will come around but don't expect it for at least 10 - 15 days.