I have a 1 year old lemon brahma hen. About two months ago she started laying eggs only once a week but now shes stopped laying completely and her crop is swollen with no feathers on. it feels like liquid. she drinks water and eats food although she has lost weight. Her muck was just a watery clear liquid but now its still runny but alot more poo within it. shes lively and alert enough. and she sometimes stands with her mouth open especially if shes been running. could this be sour crop?