For a few days now our very old Rhode Island hasnt been eating well - doesn't touch grain, ate various other, softer things like porridge and crushed biscuits and cereals. Today she is barely moving and has dropped wings and as far as I can tell has not eaten at all. I am aware that her age is probably a factor but she is much loved so I really don't want to let her go without a fight - I at least want her comfortable. Any advice would be much appreciated.