multiple buckets. put one on top of the other, screw the bottom of one to the lid of the other.
put in a large ( as possible ) hole to let the food go through.
I want to make one of these just for fun !
Looks like the drill will be a loose fit in a PVC pipe.
You can use a cap on the far end to let the shaft come through and some shaft collars so the screw action does not move the drill out.
think see-saw.... tipping bucket......
the feed comes out and fills the tipping bucket on the see-saw.
the weight then tilts and the food falls out to the feeding dish below.
you count the number of times the bucket tips.
each tip would be very accurate as to weight and you could adjust weights.
if you stop adding on the tip, then food would not sit in the bucket till the next feeding.
you could put a trap door on the pipe to stop air or critters from getting in
Could call it the Rube Robinson or Heath Goldburg device.
Get it to work and Bob's your uncle !