I wouldn't say mad but definitely jealous! With me it's Kotton, the oldest at 4yrs old, she was an only for 3 years and I swear she plans ways to ship her sisters out. If I give any of the others attention Kotton is right there trying to nose them out of the way. With my girlfriend it is Kash, the youngest and definitely a momma's girl. If my girlfriend tries to give attention or kiss any of us (yes me included LOL) Kash tries to use her body to muscle the intruder out...sometimes it's cute because she does it so slick. You know the yawn and put your arm around someone routine? Yea well Kash does the stretch thing too. Koko is just oblivious as usual and just waits her turn