I wish I knew... I'll keep an eye out because I'm having a bit of the same trouble. Allen REALLY needs to be on weight control food and Pouncer obviously does not. I have stopped the weight reduction food altogether because Pouncer was eating more of it than Allen.

Just another thing our young ones have in common.

As for the crying and whining, that might be like human children "but ma! She got a bigger slice of pie than me!" Kids will be kids - regardless of their species.