There is described a portable weighing unit (10) for weighing animals in a grazing environment. The unit (10) comprises a body having a pair of side walls (12, 14) and an end wall (13) that define a space for receiving an animal therein. A holder (17) mounted with respect to the body. The holder (17) configured to receive an enticement (18) for attracting an animal into the space. A reader (19) is mounted with respect to the body. The reader (19) is configured to read animal identification information provided on an identity tag of the animal within the space. A platform (15) is located within said space so as to receive the front feet of the animal thereon when said animal enters said space and to take a weight measurement of the front feet of the animal. A controller (20) for receiving the weight measurement of the front feet from the platform (15) and the animal identification information from the reader (19). The controller (20) being configured to transmit said weight measurement and said animal identifi
