Lol,I didn't know dogs eat Zucchinis too. Anyways, if you have some more zucchinis to get rid of, I used to cook them with some salted roasted pork. Toss it together with some pasta and pepper and you're good to go.

I once bought 2kg for charity and ended up cooking zucchinis for a week, will try it with flatbread and pesto next time.