Chicken being sick! Help

Hello all,

While sorting out the hens today I noticed one of the hens being sick,  not sure what to do as I'm a newbie to this,they were ex-bats wether that's makes a difference or not! Perhaps they are eating to much? Also there crop looks huge! And wobbles, it's more the right hand side of the chest. I've been feeling the crop and it doesn't feel strange! I'm using poultry tonic In water and sometimes apple cider vinegar! Anyone got any ideas or, may it just be a one off an that she may have ate something dodgy? Also she was doing this funny head movement, looking like she was trying to regurgitate??

Any ideas please?

Rich_Chicken

If she has a crop problem it will probably smell bad, so have a smell of her breath.

More info on here about crop problems.

http://chat.allotment-garden.org/index.php?topic=4345.0