Coming from this question here, would Godzilla's nuclear/atomic breath not feed the MUTOs with radiation, seeing that his breath is, as the name suggests, nuclear based? Seeing that the MUTOs do infact eat nuclear ordnance as a source of food and "fuel", it would make sense that any form of radiation (maybe even the Sun?) would suffice as a food source, right?
The scene in question is in 2014's Godzilla, when Godzilla resorts to using his atomic breath against the MUTOs during the final fight in San Francisco.