Brahma 4.5months mouth open and sluggish

[Teresacox]

This is my 4-5 month old Brahma Mars, (unsexed, no crowing or eggs yet). For about a week I have questioned if something off with her. She has had her mouth open a lot, she is not as active as the other chickens. She is eating but appears to peck and move it around a lot.
I was wondering if anyone new if something is wrong?

 

[HappyDuckie]

@azygous @Wyorp Rock

 

[azygous]

Too bad you haven't added your location to your profile. We could judge whether or not it's summer or winter where Mars lives. Summer heat would be an obvious reason why Mars is gaping.

 

[Teresacox]

Oh I’m in England. It’s winter so shouldn’t be heat! I have spoke to vet and getting treatment for Gapeworm. Hopefully that will make Mars better quickly x