What is the blood from on her neck below her ear? It sounds like she might have canker or some type of infection in her beak. Canker, a protozoan disease, apparently smells rotten. Wet fowl pox is another disease that can cause yellow to grey patches inside the beak and in corners of the mouth. If she has eaten today, she should have some food in her crop that could be felt. Sour crop may cause a full puffy crop with sour smelling odor.