A feed dispenser for an animal comprising: - an upper section for containing the feed, a lower section for dispensing the feed, and a dosing chamber situated between the upper section and the lower section, - a dosing piston being coaxially arranged with the dosing chamber, the dosing piston comprising a first body having a first truncated conical surface portion and a second body having a second truncated conical surface portion, wherein the first and second truncated conical surface portions (6a, 7a) are arranged with their apexes facing each other, so that a dosing space is formed between the first and second truncated conical surface portions (6a, 7a) and the dosing chamber, - the dosing piston being reciprocatable between an upper position (U P) for filling the dosing space of the dosing chamber with feed from the upper section and a lower position (L P) for discharging a dosed feed from the dosing space of the dosing chamber into the lower section, wherein the first body is slidably received in a stationary enclosure, which is situated in the upper section containing the feed and is stationary with respect to the upper section of the feed dispenser, wherein the first body is slidably mounted on a piston rod of the dosing piston and the second body is fixedly mounted on the piston rod of the dosing piston, wherein the first body has a maximum outer diameter (D 6) that is larger than an inner diameter (D 4) of the dosing chamber, and the second body has a maximum outer diameter (D 7a) that is smaller than the inner diameter (D 4) of the dosing chamber, so that the second body is slidably received into the dosing chamber during an upward portion of the movement to the upper position (U P), wherein the first body is abutting the dosing chamber and sliding on the piston rod to provide an axial spacing to the second body that increases during a downward portion of the movement to the lower position (L P), and the dosing chamber comprises a cylindrical inner wall portion, which is surrounding the dosing piston, the cylindrical inner wall portion being configured with such a height (h) that the cylindrical inner wall portion is forming an enclosed dosing space with the first truncated conical surface portion and the second truncated conical surface portion in an intermediate position (I P) of the dosing piston. - an upper section for containing the feed, a lower section for dispensing the feed, and a dosing chamber situated between the upper section and the lower section, - a dosing piston being coaxially arranged with the dosing chamber, the dosing piston comprising a first body having a first truncated conical surface portion and a second body having a second truncated conical surface portion, wherein the first and second truncated conical surface portions (6a, 7a) are arranged with their apexes facing each other, so that a dosing space is formed between the first and second truncated conical surface portions (6a, 7a) and the dosing chamber, - the dosing piston being reciprocatable between an upper position (U P) for filling the dosing space of the dosing chamber with feed from the upper section and a lower position (L P) for discharging a dosed feed from the dosing space of the dosing chamber into the lower section, wherein the first body is slidably received in a stationary enclosure, which is situated in the upper section containing the feed and is stationary with respect to the upper section of the feed dispenser, wherein the first body is slidably mounted on a piston rod of the dosing piston and the second body is fixedly mounted on the piston rod of the dosing piston, wherein the first body has a maximum outer diameter (D 6) that is larger than an inner diameter (D 4) of the dosing chamber, and the second body has a maximum outer diameter (D 7a) that is smaller than the inner diameter (D 4) of the dosing chamber, so that the second body is slidably received into the dosing chamber during an upward portion of the movement to the upper position (U P), wherein the first body is abutting the dosing chamber and sliding on the piston rod to provide an axial spacing to the second body that increases during a downward portion of the movement to the lower position (L P), and the dosing chamber comprises a cylindrical inner wall portion, which is surrounding the dosing piston, the cylindrical inner wall portion being configured with such a height (h) that the cylindrical inner wall portion is forming an enclosed dosing space with the first truncated conical surface portion and the second truncated conical surface portion in an intermediate position (I P) of the dosing piston.