I've only ever seen one or two in poultry poop, or huge amounts like that in necropsy pictures. Not sure what I would do if I found a pile like that in my coop. I'd worm, just don't know if I'd use Safeguard or pyrantel pamoate... and I would worm knowing that worming might actually kill the bird. Would probably also give fluids either orally or subcutaneously if it were one of my beloved peafowl or turkeys.
If she were mine and I decided to use Safeguard I think I would give 0.23ml per pound for five days in a row, that will treat all worms, but if you want to treat just the large roundworms, give it once and repeat in 10 days.