Yup...just like Michelle said...you're just plain overfeeding her.
The feedings on the bag are indeed recomendations, and I've always found them a bit high...(they can sell more food if you feed more of course).
Even so...if she was eating a certain amount, but getting more exercise at one point...it might have been an okay amount at that point, but if the dog changes activity level, then you need to change the food amounts. Simple as that. (we should do the same thing...but it's much easier with dogs!
). Rip and Xander were not as active for a while due to old age and injury...so I cut them back, now they're at a good weight and doing more exercise...I've upped their food again. It shouldn't stay the same unless the dog continues have the same amount of activity (my Inara eats 2 cups, no matter what...Score gets less in the winter because we *do* less in the winter, etc)
Get in the habit of feeling her ribs every so often...so she doesn't blow up suddenly. keep an eye and a hand on her weight.
Another idea is to get a kibble-dispensing toy for her dinner...or have her work for it, so she's not just eating it out of her bowl. A tug-a-jug, a Kibble-nibble, a Kong Wobbler...these all dispense kibble for dogs. Mine love eating out of theirs...full and tired dogs!
"I don't have any idea if my dogs respect me or not, but they're greedy and I have their stuff." -- Patty Ruzzo
"Dogs don't want to control people. They want to control their own lives." --John Bradshaw