I've found that food that isn't liked, generally gets even less liked over time. I guess it gets stale maybe. Hate to say it but unless they have a change of heart you're probably going to have to chuck it at some point. I've had to throw out a few foods that I had high hopes for. I thought for sure Cyclops-eeze flakes would be a slam dunk but nope. Even bought another one thinking "this time they're sure to like it!" Nope. Both ended up filed under "G".
