Roof rats or tree squirrels are eating the new growth and developing flower buds on my orchids which I grow outdoors on a deck attached to my house. After three years without a problem they discovered my plants a month ago. My exterminator says rats do not eat plants and tells me the squirrels are the cause and to use hot pepper spray or trap them. I have set rat traps out and caught two. Whatever it is is able to remove the bait from the traps without triggering the trap; this happened twice. Any thoughts? Thank you.