Just that really. Our older cat died a few months ago. And although when he was alive they literally ignored each other 99% of the time and the other 1% they would fight, he seems to be really missing him. Lots of meowing around the house for now obvious reason. Wants our company a lot more. And now he'll only eat if one of us is stood behind him. If we walk off he stops eating and follows us. What's got into him? Any ideas?