Lots of good advice on how to deal with the food aggression, but just wanted to check how your daughter is now with the dog. The dogs food aggression is something you can overcome, a child developing fear of the dog as a result of a bad experience is presumably much harder?
Apologies if I'm being nosey or rude, I'm not intending (or have any reason) to question your parenting skills or cause offense. Just would hate to think this had put her off the pup.
Sh xx