My 5 year old hen has a small, semi hard lump where the top of her thigh reaches the abdomen. She laid an egg yesterday and the day before that. She is bright and alert, her appetite however has decreased a bit. The lump is 1.5 cm wide and it sinks when you press down on it, when you push it down, it makes a faint sound that kind of sounds like compressed air being released. Sometimes I hear gurgling from her abdomen area when she us walking around, she also has runny poos. Can someone tell me what is going on?