I have been reading yout experiences which are a carbon copy of what I am experiencing with my husband. The cat food is a prime example and I am equally at a loss. I discovered something that seemed to fit the pattern and it is front lobular behavioural dementia. Have a look and see what you think. I would lime to stay in touch with you as it us so comforting to know that I am not alone/going crazy but at my wits end. I am too old to be branching out on my own but any clues as to how to cope with the frustration and despair of not being able to have a simple transaction and the constant tantrums that come so unexpectedly, would be so aelcome