Some caterpillars might though Rhus are generally quite toxic to most things.

The flowers are stripped overnight and within 1/4 days are all gone, can carepillars do this as there were an abundance of flowers. Would you know if moths can eat these flowers.

i don't suppose you could post a photo could you, even if there are no flowers?

Thanks for the photo. Has this plant ever developed the red cone shaped seed heads in the past? If not, it may be a male plant and the flowers are just falling off leaving the stem or it could even be a female dropping unfertilised flowers.