We left 2 inches from the PVC to the bottom of the feeder. When you fill with feed it comes up to the PVC. We're having trouble with rats getting into the new feeder. For some reason they don't touch the first one we built but get into the new feeder on the right in the picture. I ordered some PVC caps to cover them at night. Until they come in I'm going to layer the bottom with sticky traps tonight. Putting on and taking off caps everyday doesn't make me happy.

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