It's hard to know if it's an air sac or not - there is an abdominal air sac, so if she was bullied and ran/injured herself, it's possible it could rupture.
Waiting on the OP to give more info if they can. Since the pullet is having difficulty breathing and the lump is above the vent, it may be worth investigating.
Of course, this is a guess on my part.
Hopefully if the pullet stays calm she will make it until the vet appointment.
Waiting on the OP to give more info if they can. Since the pullet is having difficulty breathing and the lump is above the vent, it may be worth investigating.
Of course, this is a guess on my part.
Hopefully if the pullet stays calm she will make it until the vet appointment.