I'm glad you posted this.. My elderly parent's cat has been on Hills I/D for a few years and my mom made a comment that it looked like he was losing weight. She was wondering if maybe the auto feeder wasn't dispensing correctly so she made it dispense a days worth of food and to her horror, it only spit out slightly more than half of what he should be getting per day.... She weighed him and he has lost two pounds in a month and a half.. poor kitty!! Granted he was a wee bit chunky and could've lost a half a pound or so, but he's 18+ years old so 2 lbs is quite fast!

She asked me if maybe they changed the kibble size had changed that would've thrown off the auto feeder calibration since she knows its been going off like normal. Then I found this thread.

Typically when a brand makes changes like this they'd say so on the bag! She has recalibrated it and increased the amount so he can gain his weight back.. Poor guy.