Nibbler and gobbler

Recently I just got another stray kitty to be my family member and I couldn't be more happy about this new baby (around 8 months). She is a gobbler and never seems full so she finishes her food very quickly which is fine because I only feed twice a day (canned food), overeating is not a problem for her. But what gives headache is my boy (1 year 7 months), he eats very slowly like a nibbler who would hang around to play a little and go back and forth finishing his food "gradually" (hours) that give my new baby girl the chance to go to his bowl to finish his food for him. I tried to leave my boy in the room by himself when feeding but he just couldn't finish his food immediately and has to go out of room to check on me and everything or play, on the other hand, my baby girl would just take any chance to sneak in to finish her brother's food. BTW, my boy's size is bigger than my girl. Even if my boy doesn't seem like enjoy his food very much, he is still on a little chappy side(11 pounds) whereas my new baby girl, who perfectly enjoys food a lot, is in perfect shape (7 pounds) at the moment. Given my situation above, do you have any solution?

RESPONSE:
Your baby girl is likely eating quickly because, after being a stray, she was never sure when she would eat again and learned to eat quickly so no one would steal her food. Your boy is just the oppisite, secure in the knowledge that he will eat again and not concerned that is new sister steals his food.

In the cat world, when a cat leaves his food, it becomes fair game for anyone else who wants it. As long as he is not being intimidated away from his food by the little one, I wouldn't worry about it. Wet food should only be left out 30 minutes or so anyway so if he doesn't finish it all, is not losing weight, and seems satisfied, let her have it.
Get some good quality dry food so you can leave some out all the time and allow the boy to nibble whenever he wants. Give them treats a couple of times a day. This will help the little one feel more secure that food will be plentiful but she may never stop wanting to eat his leftovers.
If you can, play with them, especially the boy, prior to meal time to help stimulate his appetite.
You can also feed your boy smaller amounts more often, up to 4 times a day, so he can "clean his plate" leaving nothing for the girl to eat after he finishes. And feed the little girl more at meal times so she get full. She is still growing and needs more food than the male.
As long as your boy is getting enough to eat and no one is losing weight or getting fat, I wouldn't worry about it too much. Your girl will likely calm her eating habits as she gets older.

Good Luck!

Donna, House Full Cats Mom