My wonderful husband constructed a salad table for me to plant in this spring, out of reused lumber and just the right size for our deck. The only problem: squirrels. I grow a lot of plants on my deck and in containers at other places in the yard, and every time I fill up something new with potting soil, the squirrels arrive to dig in it, either burying something, or hoping they'll find something, or just scratching away for the fun of it. They seldom eat anything (though they are the prime suspects in the chewing up of several kale seedlings last year) but plants get uprooted and die. Also, we have cats wandering around who might regard the salad table as a litterbox, or just lie down for a nap on top of the lettuce.
Solution: salad table cover.
Closeup of the carpentry: