The short answer is no, no in some places. However, if you don't build a flat, you'll need to take certain precautions to ensure your chickens stay healthy and safe from predators. For more information, see my article, Does Your Chicken Coop Need Flooring?. Many chicken farmers promote the benefits of a concrete floor for their chicken coops.
To tell the truth, concrete is probably the safest flooring option, as it eliminates the possibility of digging predators. It's also low maintenance and won't rot, meaning it can last forever. Concrete is by far the best flooring option you can consider. Although you must have a level surface at ground level to implement it, it prevents rodents from burying, is easy to clean and disinfect, and rarely leaves room for poultry-related lice and mites to hide.
The material of the floor of your chicken coop is very important. The floor is what your chickens will be on, and it will be where they will go to the bathroom. You want a material that's tough enough to provide them with a safe area, but you also want it to be easy to clean. A chicken coop requires a floor for chickens to stand and hold a few inches of bedding.
A good floor should be one that is dry, easy to clean and durable, with a good hard surface. If it is made of soil, it must be well drained and, if it is constructed of hard or cement, the surface underneath must be well drained to prevent moisture from rising through the cement and affecting birds. It should also be rat-proof. A cold and dry chicken coop can be cared for more easily than a damp and damp house, which is undesirable.
The compost made by bed hens is ready to use in the garden every June and is the most effective fertilizer I know of. If the concrete surface is rough, chickens can scratch their legs, leaving them susceptible to bacterial infections, including the deadly bumblebee leg. The chicken coop should be divided into two sections, with one door in the middle and one door for each section to the three outer doors in total. It won't last long and it's too easy for any predator to break through and get into your chicken coop.
A sloping shed is suitable for a chicken coop, although if you like it, you can build a gable roof. Dry grasses, leaves and hay are also sometimes mentioned for use, but you may want to avoid them, as they are high in food and are more likely to be eaten by chickens than those left to help protect the floor and help maintain a healthy and comforting chicken coop environment. Alternatively, if you have a portable chicken coop, you can simply move it to fresh soil and not worry about cleaning up excrement. If you live in an area that is prone to minor flooding, you will need an elevated chicken coop with a floor.
If I let this muddy mess be the floor of my chicken coop, the chicken coop would be exposed to too much moisture. Such drinkers are practically a must for me in winter, since I think it's silly to go at the expense of a heated drinker for so few chickens. In a situation like mine, if the bedding gets wet and dirty, you're either not putting in enough or you have too many chickens for this system. Whether you're building your own chicken coop or buying one in-store, there are a lot of considerations you need to keep in mind.
This post contains affiliate links for my favorite products from Amazon and Rita Marie's Chicken Coops. If your chicken coop has no floor, the best way to prevent rodent activity is to never have food inside the chicken coop. If done correctly, bedding and chicken droppings will become rich and fertile soil that you can use in your garden. It wasn't until I once again moved and inherited a specific configuration for poultry farming that I began to learn the needs of domesticated chicken from hatching to full maturity and production.