They might -- but I highly doubt it. And I can't see it being the best for him to eat...I would just remove them if I were you. Ramshorns are considered minor pests- they breed fast enough that you could have a population explosion in a matter of days. They tend to be hard to get rid of (like all snails) once they get to that point.
And before I forget- welcome to MFT! I see that you joined recently.