An animal feed system in which fluid is provided for a cup (C), said cup (C), as seen in side elevation, has an open top, sides that project substantially vertically and means for accepting fluids that projected through the bottom of said cup, said system includes means for expelling said fluid into said cup along a substantially lateral direction； wherein the means for accepting fluid are incorporated in a nozzle housing (NH) additionally comprising bar means (R) located between them, said bar means are accessible from a top of the cup and are functionally incorporated with said means for accepting fluid in such a way that the movement of said bar means out of a nominal vertical orientation causes said means to accept the fluid to allow fluid to enter into said cup through said means to expel said fluid； characterized in that a float (FLT) is present inside the nozzle housing (NH) which serves to automatically limit the movement of the rod means (R), and therefore, the effect of fluid flow, when the level increases of fluid expelled into said cup (C) and into said nozzle housing (NH)； wherein the float is in an annular space between said nozzle housing and said rod means between them, and the annular space is smaller in a higher location than in a lower position.Un sistema de alimentación animal en el que el fluido se proporciona para una copa (C), dicha copa (C), como se ve en elevación lateral, tiene una parte superior abierta, lados que se proyectan sustancialmente verticalmente y medios para aceptar fluidos que se proyectan a través de la parte inferior de dicha copa, dicho sistema incluye medios para expulsar dicho fluido dentro de dicha copa a lo largo de una dirección sustancialmente lateral； en el que los medios para aceptar fluido se incorporan en una carcasa de boquilla (NH) que comprende adicionalmente unos medios de barra (R) ubicados entre estos, dichos medios de barra son accesibles desde una parte superior de la copa y se incorporan funcionalmente co
