My hen has recently started to display odd behavior and I am very worried. She is a hybrid Rhode Island Red. I started off with three hybrids, all bought from the same place at point of lay. The other two both had severe problems and died. I would like to note that they lived a perfectly clean, healthy, happy lifestyle and their diet and general habits were never changed or messed around with by me or my family. I have had two other purebred hens for the past few years, both bought from good places, and they have never had any problems and are perfectly healthy. This hen is about 6/7 years of age. I fear that an egg may have broken inside her. I have not seen her defecate in the past two days maybe, but she has been eating and drinking fine. She is in a leaning back, almost 'sitting' position as if she is trying to lay an egg and/or is constipated. Her breathing is quite odd and she appears to be taking in air quite rapidly. Her back end is quite smelly as well. We keep our hens as pets and my other two have begun laying again and are fit and healthy, ready for spring. Is it just her genetics that have caused these problems? Is it her age? She and the other hybrids were our first hens and I did not really trust the place that we got them from. All three had different symptoms but all were obviously ill. I am keeping her comfortable and I am happy that she is still eating and drinking but I am worried as I don't want to go through the process of a poorly hen again, as it was not pleasant. My father is going to the vet tomorrow with our dogs and is going to ask then but I don't want to leave it too late.