sunday i had a year old hen die. two weeks ago i treated her for a sinus infection. she looked fine sat, sun morning she looked a little down, sun evening dead. mon another hen started looking a little down, wormed them with wazine, tues hen was holding wing feathers towards the ground, this evening got her out of the pen she does sat there on the ground, breathing was very slow and then she died. what could be going on. first was a royal palm, second a bourbon red. both toms are fine, no signs of anything being wrong. i bought these birds from a individual two months ago. they have been penned by them selves. i belive some sort of breathing problem. she looks fine other than being dead. thanks for any help........