We have good news, Shawnda. Dried Christmas tree flocking is not considered to be a poisoning hazard to pets. But do keep in mind that if a pet were to swallow large pieces of flocking, a gastrointestinal obstruction could result.
If you are planning on spraying flocking on your tree, we advise that you keep your pets out of the area while applying it. You’ll also need to ensure that it is thoroughly dry before letting them back in the room to avoid problems from accidental exposure such as skin, mucous membrane or gastrointestinal irritation.