A new element has crept into my wifes behaviour and that is she has become quite greedy in her eating habits which is totally against what her true nature used to be. She has recently started eating sweets which she hardly ever did .she is putting quite a few in her mouth at the same time and getting more in her hand ready, also the same with crisps and biscuits keeping the packet in her hand apparantly to prevent others having them. My wife was diagnosed with Alzheimers around 2 years ago.is this normal behaviour and can I do anything to help the situation.