Can rats eat zucchini?

Yes, in small amounts

Yes, rats can eat zucchini in small amounts. Zucchini appears on the PDSA’s chart of safe fruit and veg for rats, under its British name, courgette. RSPCA Australia lists it among daily vegetables, and the Zurich animal welfare society (Zürcher Tierschutz) calls it well suited.

How to serve it: washed, cut into pieces