I have a hen that is around a year old,she looked and ac5ed fine yesterday , this morning I noticed she did not come out of the coop with the rest of the hens so when I went in I noticed that she is breathing funny she will stretch out her neck like she's trying to breath but she's making a gurgling sound,she won't eat but does drink water,someone told me that she could have gapeworms but I don't know what to give her for that,someone help pls I hate to see her die,all the other hens are doing very well no problems.