In Indiana, the main predators are hawks, weasels, and coyotes. There are snakes in the southern part. My coop is tight as a Fort Knox Safe except I let them put themselves out unless there is a predator around potentially.
Most likely off their cycle or they maybe just slowing down due to weather. If you have lights on a timer they won't do it as bad. Start at 6am and go to 10pm.
Buy started pullets at 6 months old. Well worth the extra money. They can start them better in big hatcheries. Not near the death loss and they are healthy to start with. I sell all I produce so we get ours still. They are running about $3 a dozen anyway you go about it.
What are you feeding? Are they broody? They probably just are off their cycle. They lay an hour later each day until it gets to dark then they stop for a day. They should resume soon. They are slow at first and they will speed up. They slow down after a year and once they molt they slow down...
I would use a heated pressure washer and/or a chicken scraper and water, which is a flattened out hoe. For that, a 4" METAL putty knife would be your best bet. Wet the manure first and let it soak for 20-30 minutes and then scrape it.
I feed cracked corn, Blue Seal Extra egg 16% layer pellets and oyster shells. I then feed on top of that grass and clover mix haylage which I just started feeding due to the lack of damaged tomatoes which I have left from my truck patch. I feed nothing but the best feedstuffs money will buy...
I personally just mow my yard which has lots of white and red clover. I don't spray the yard, but I do spray the garden and spot spray so I don't have to trim the yard. Just don't use the treated grass for silage.
I put up some grass clipping haylage and the hens pecked at it. They ate it in about an hour and seem to like it. I opened the bag yesterday and this is the first batch and this was the first feeding.
If you are selling to the consumer on your property you are exempt. Permit is needed for farmer's market or to sell to schools, hospitals, restaurants, and/or other businesses. This is in Indiana. You will need to grade and size the eggs and black out carton labels.
The crops I would plant for a strict haylage crop would be Kentucky Bluegrass or Timothy, Then for the legumes I would plant Korean Lespedeza, Red or Alsike Clover and/or alfalfa.
A chicken has three points of digestion, the crop, true stomach and gizzard. A ruminant has four points of digestion: the rumen, reticulum, abomasum and the omasum. Chickens also swallow their feed whole, whereas a ruminant chews their food. I am wanting to try feeding silage.