below 50F - feed or not to feed

Thw water in my pond has reach 50F, might even be cooler at night time, I
pulled in my UV light, but the water features remain on until it gets too
cold. My fish spend most of the time at the bottom in the deep end or the
smaller ones are hiding in the shallow end under rocks, but they do come up
to play, should I be feeding them if they are still active or just leave
them alone?

Joel.