Cat has something wrong with him. Is on his last legs. Enjoying attention and is purring but not eating, though clearly hungry. We've tried his usual food, 'gourmet' food, tuna, chicken etc but all he will eat is Dreamies. Is there a cat food similar to Dreamies we can try? Would it be bad for him to have more than the recommended portion of Dreamies? Trying to make him as comfortable as possible in his last days.