You only need 1 roo with 13 hens, I'd say eat the others or sell them, or give them away. Too many roos will inhibit egg production, the hens are using all their energy to evade roosters, instead of making eggs. They probably aren't eating very well either, roos will be trying jump them at the feeders.
Aside from that, it IS molting season, they're probably starting molt. Increasing the protein can help them get through it faster. It takes a lot of protein to grow nice new feathers. It may take from 6 to 12 weeks to finish molting, but with extra protein, some of the hens will resume laying, at least a few eggs.
Last year we had trouble with some poor feed quality, my hens quit completely for about 4 months. I found a new feed dealer, got better feed, increased the protein, they were laying again in about 2 days. By two weeks on the new feed, we had tons of eggs.
This year, with good feed, my hens are molting, but they haven't stopped laying. They've slowed way down, but I'm still getting a few eggs everyday, anywhere from 4 to 9. I have 28 hens and pullets, 4 or 5 haven't started laying yet, I know I have a few old girls who've mostly quit altogether, I'm guessing 3 or 4. So about 19 actual layers I can count on. When not in molt, during the winter, I get an average of 16 eggs a day. So while 4 to 9 isn't great, it's great for during a molt.