A system for collecting the excreta flowing on the ground of an enclosure for livestock, for example cattle, said system comprising: (i) a flooring, comprising: - an upper layer, made of a material capable of undergoing an elastic deformation and including an upper surface suitable for the animals to rest thereon, - ducts arranged under said upper layer, adapted to receive a liquid, and - through-orifices, formed through said upper layer, extending between the upper surface of said upper layer and said ducts, for the flowing of the excreta from said upper surface to the ducts, (ii) means for collecting the excreta circulating within said ducts, and (iii) means for conveying the excreta within said ducts, so as to generate said circulation of said excreta towards said collection means, characterized in that said flooring includes a receiving surface covered with said upper layer, said receiving surface including support portions that are separated from each other by grooves each having an upper opening closed by said upper layer to form said ducts, said upper layer consisting of a sheet added on said receiving surface, and said receiving surface being consisted of: - a set of stringers that are fastened to a support surface, juxtaposed to each other while preserving a space defining said grooves, or - carpets including a base, a lower face of which is intended to rest on a support surface, and an upper face of which is provided with protruding structures arranged remote from each other, which delimit between each other said grooves and the free face of which forms the support portion. (i) a flooring, comprising: - an upper layer, made of a material capable of undergoing an elastic deformation and including an upper surface suitable for the animals to rest thereon, - ducts arranged under said upper layer, adapted to receive a liquid, and - through-orifices, formed through said upper layer, extending between the upper surface of said upper layer and said ducts, for the flowing of the excreta from said upper surface to the ducts, - an upper layer, made of a material capable of undergoing an elastic deformation and including an upper surface suitable for the animals to rest thereon, - ducts arranged under said upper layer, adapted to receive a liquid, and - through-orifices, formed through said upper layer, extending between the upper surface of said upper layer and said ducts, for the flowing of the excreta from said upper surface to the ducts, (ii) means for collecting the excreta circulating within said ducts, and (iii) means for conveying the excreta within said ducts, so as to generate said circulation of said excreta towards said collection means, characterized in that said flooring includes a receiving surface covered with said upper layer, said receiving surface including support portions that are separated from each other by grooves each having an upper opening closed by said upper layer to form said ducts, said upper layer consisting of a sheet added on said receiving surface, and said receiving surface being consisted of: - a set of stringers that are fastened to a support surface, juxtaposed to each other while preserving a space defining said grooves, or - carpets including a base, a lower face of which is intended to rest on a support surface, and an upper face of which is provided with protruding structures arranged remote from each other, which delimit between each other said grooves and the free face of which forms the support portion. - a set of stringers that are fastened to a support surface, juxtaposed to each other while preserving a space defining said grooves, or - carpets including a base, a lower face of which is intended to rest on a support surface, and an upper face of which is provided with protruding structures arranged remote from each other, which delimit between each other said grooves and the free face of which forms the support portion.