One thing to still consider also is that it's still breeding season for the males. He could just be off feed due to that. We just had a male finally eat again for the first time Sunday since December. And we have another male who's going on 7 months without eating. Just keep offering.
One thing I found helpful for feeding is to put them in a small box with a live rodent. Close the box up and leave it sit for a little bit. We've had pretty good success with problem feeders finally eating. Another thing is to feed late at night. That's helped a few times also.
Good luck with your guy!
That's true. Our other guy didn't eat from October through February. Maybe this guy had been paired a few times, would that make a difference in how long he might fast due to breeding?