Q.Zucchini Fruit Disappears Overnight
Our zucchini fruits grow about an inch or so, then poof they are gone. We suspect baby bunnies. Is there anything we can do to save them? We have already fenced in the area. The plants are giant this year and we have had a lot of rain. Now it is to be sunny for several days. I have heard of adding more calcium to the soil. Will this work?

You may be dealing with insect problems as well as feeding the bunnies. See this article for more information. A side dressing of compost or other rich organic material should help, the addition of calcium is usually suggested for blossom end rot in tomatoes.