Comment by belorn

Its mostly about the size. For rose bushes and berry bushes it is pretty simple. For other things, seeding are kept inside during winter (Swedish climate) so by the time they get planted they are big enough that the chicken leaves them alone. Some plants do need a mesh net like strawberries where the chickens will leave the plants alone but sometimes goes after the fruits. There is also large sized steel meshes for the exceptions where plants are large enough to not be eaten but so small or freshly planted that a chicken that is scratching the soil would ruin the plant.

(The context is our garden around the house, not a professional farm. Can't say anything if this could be used in a larger setting.)