Finding leaves that look chewed on or eaten can signify that deer or rabbits have been feasting in the garden. Rats, mice, and gophers tend to eat and bite at the roots.
To protect the plants, buy wire waste baskets and place them over the top of your plants. Use garden staples or landscape staples to keep the baskets embedded in the soil.
Measure your plants to make sure they can fit without being crushed, and make sure that the circumference of your plants does not exceed the width of the basket.