11-11-2014, 08:24 PM
(11-11-2014, 01:13 AM)Henlus Wrote: Maybe the hot weather reduce their immunity and lead to Newcastle disease infection. Heat stroke can also result in that. It would be better if you find a way of ventilating your pen.
(11-11-2014, 06:20 PM)tucurj Wrote: it may be cause by heat
Thanks for the replies, I think the heat will be the main culprit. The pen is not that well-ventilated though.