Changed food 12 days ago (11/9) and ZERO eggs as of today / Plus one loss to a predator

[LuciferRoo]

Tomorrow will be one month. Still nothing.

At first I thought maybe you have an egg thief, but then I went back to your original post and see that you have 16 hens. That would eliminate an egg thief.
Someone suggested it's seasonal but you're in North Florida so I doubt that has anything to do with it. I'm is Southern Texas and my hens lay though the winter.

What type of hens do you have?

I wrote earlier about having a fox attack mine and kill a rooster. He actually killed 2 roosters.
My chickens did stop laying to but now are back to full production.
I feed mine Nutrena Country Feeds 16% Layer Pellets Chicken Feed in the morning.
In the evening I give them high protein Chicken Scratch grains.
They seem to be doing well on this.
I also let them out of their run in the evening for 30 to 60 minutes. Because of the fox incident, I sit out in the backyard while they forage.
They do enjoy it. They've turned their run into barren earth but the backyard has grass, and they love fresh grass.

What was your original feed?
What are you feeding them now?

 

[MROO]

10-4. Just seemed kinda odd that they would ALL stop and that they've stopped for this long. Still nothing and now on Day 15.

An established flock will usually go into molt in sync. If you are genuinely concerned about the feed, most places will allow you to return or exchange unopened bags. It's worth asking. If not, get a couple of bags of their usual food and mix it 50/50 in their feeders for awhile. That should smooth out the transition.
There's an easy way to check if they're eating the new food. Gently feel their crops at night to make sure they're full. Checking again in the morning will tell you if their bodies are processing what they ate - the crop will feel soft and empty. If you're still concerned, keep an eye on their weights. Simply feeling along their keels and breasts should be enough to tell you if they're starving themselves.
A little extra protein helps during molt. You can give them a supplement, but simply adding meat scraps helps, too. Ask your butcher (many grocery stores have them) for soup or scrap bones. I boil mine first (great broth!) then crack them open for my birds. They love them!