they an inch to inch a half long and ALIVE - youngster has got pin worms hence the worming, but only seen one or two on top of poo these were all in poo and on grass around
My mare came with them from market,I kept her in for three days, she had a small bed, new bed daily (straw), scrubbed walls after 24hrs and then again at 48hrs and that cleared them, used equest.