Sign Error

A sign maker in California just started taking his new "medication" for glaucoma. The effects have caused him to goof up some signs. Can you determine what they should have said?

1. DINER: If we're not fat then you don't pay!
2. DELICATESSEN: Service with a smell. 3. ZOO: Please do not breastfeed the birds!
4. GROCERY STORE: State law prohibits birdfeeding in public.