I am so sorry for your loss. I had to have my darling kitty put to sleep last March. She was only 10 and had severe lymphoma. The grief was overwhelming at the time. There was a board that really helped me. It was http://www.petloss.com. It made a difference in the couple weeks afterwards.

I think grief is a personal process, and we all do it differently. I don't remember eating much either. My husband actually had to coax me to eat. But if you feel you'll have a hard time with food, why not get yourself some low-carb candy or other treats to use instead of regular candy. At least if you feel you really have to eat it, it won't be such a bad deviation from the program.

My heart and prayers go out to you.
Take care,
Bonnie