Maybe consider getting your little one involved in the feeding process. My 2 year old son is "in charge" of feeding our Pug and he hasn't had any interest in eating her food. I am not sure why he doesn't want to eat her food but heck knows he's sampled other far grosser things off the ground. If all else fails, I would move the food out of her reach. Good luck and hopefully you get some good suggestions.
To add - He opens the food bin, scoops the food, pours the food out for her, closes up the bin). Every night he reminds me we need to feed the pug. it's pretty cute actually and it surprises me how he clearly feels pride in feeding the dog. The small things matter to toddlers who have so little control and choice.