Q.What must I do to save my new canna bulbs from being chewed and destroyed?
I have pulled the canna plants from the ground in hopes to save them…..I am really disappointed; this happened last summer with different bulbs.

Certified GKH Gardening Expert
You didn't mention whether you think your bulbs are being eaten by rodents or insects, so I'm sending you article that cover both scenarios:
https://www.gardeningknowhow.com/ornamental/bulbs/bgen/protect-flower-bulbs.htm
https://www.gardeningknowhow.com/ornamental/bulbs/canna/managing-canna-lily-pests.htm