This hair-breed sheep is about to give birth to a lamb.  She lies down to push until she feels the lamb's feet clear the birth canal - (two yellow objects under her tail.)
Then she stands, and the Pyr begins to clear the membrane from the lamb's head before the rest of its body has cleared the ewe.  Since even a ewe in labor is capable of running off, it is obvious that this ewe is quite comfortable about the dog's help.