hen problem

[xristos]

hello today i found one of my hen not energetick as always, she breath with her mouth open and try to find shade she is away from other chikens she is 6 month old and she still have lay no eggs but from today she seems to have spasms in her abnomel all her systers start lay a month ago, i nothice her poop a white small like diaria after her normal poo It is still summer here in greece and the weather is still hot but not like august all the other seems fine she just try to isolate her self and she is really heavy commpare to the others any help will be great it is a heritage Greeck chiken breed almost extint and i dont want to cool her. tnx