young Marsh Harriers suffering

I am having concerns for this brood of Marsh Harriers -- yesterday the male brought in just one small food item but both juvs had a couple of short flights -- today there was mayhem around the nest site area with 4 different females and four males all falling out -- the male brought food twice and passed it to two different females neither of which brought food to the young in the nest such was the level of fighting between the different males. females and 4 fledged juveniles!  this bird still has down on the crown and obviously short-grown wing and tail feathers