Hi Peppapig,
You are about to be in ketosis any time now and the feeling for food will leave you. For now throw the leftovers straight in the bin, don't even think about that, just bin them the minute he finishes them. By the end of next week you won't even think twice about what you are giving him. You will open sweets, crisps, peel apples, hand out grapes and not think about what it is that you did. I feel ketosis is like a state of hypnosis, you recognise all these foods but it doesn't cross your mind to put them in your mouth. You may of course get the odd craving but you will be so enthused by the progress you make, it won't dawn on you to cave in.
Wishing you the best of luck.
Doirin