Hydropericardium

Gross lesions included: collected as much as 4 mL of a straw-colored transudate in the pericardial sac. A case seen in a flock of 6000 broiler birds at an age of 10 days with a minimum mortality i.e. 15 per day. On necropsy, tentatively confirmed the case as IBH. Do we have any better therapeutic management to approach this disease? Thank you