Hope the dog doesn't get too fat

Carter is in the "feed the dog" phase. Ryder went through this and we had to lock Tobi outside every time we fed Ryder for a while. I hope it doesn't come to that, but she is such a stink. And, despite her age, she knows exactly what she's doing and that it's naughty because she gives me the naughtiest look just before she does it. What a little stinker. Of course, Ryder eggs her on too, which doesn't help. But what can you do?