For at least one unit (1) that a device of separation and the mixing feed for domestic animal include for process feed, which unit includes a conveyer lane (2) for receiving one or more packets (3) of feed. Conveyer lane includes conveying device, is used to convey the packet being received or packet of feed from an arrival end a to discharge side. Unit includes for the separating means from a packet separation feed for being transported to discharge side. The device includes: to be mixed into mixing feed component and be put into (26) to enter the separated feed of supply in case to a forage mixture of mixing tank and be used for. Separator is configured to a cutter unit (17), to separate a slice feedstuff arrangement from end face to the discharge side of the packet occurred to discharge side. Cutter unit can separate feed according to a cutting path, so that the end side in face of the discharge side of the reservation part of packet is tilted relative to vertical line backward.
