How do male cats act around pregnant females??

I was told long ago that male cats will stop eating when a pregnant female is around, is this true?

I have two neutered adult male cats, that live outside and they are fine together. However, the other day a stray female cat(who I think is pregnant) has come to our home. Strays are not uncommon where I live but their reaction to this female is far different from how they normally act.

If the female stray is anywhere around they will not come close to her, they hiss and back away. They even leave their food bowl if she comes close and they will only come back when she's gone.

This is very trouble some because they have set food times and they are pretty hefty eaters. It also worries be because they are nearly 11 years old, and i don't want them getting sick, too thin, or anything like that.

No it's not true.

Your boys are backing away because she's an unknown cat not because she is or might be pregnant.

We never had a pregnant cat in the house. I kept a feeder on the porch for my boys to snack on, and Fred would bring pregnant neighborhood cats up to feed them. He would only allow the pregnant ones and the new mommies to eat, and would chase away anyone else. He wanted to be a mommy cat SO badly. Silly boy.