Example embodiments describe a system (101) configured to determine a condition (200, 201) of an animal (100, 310), the system (101) comprising a motion sensor (503) configured to measure movements (110, 111) of a limb (103) when attached to the animal (100, 310)； the system (101) further comprising an electronic library (504) comprising movement patterns related to respective conditions (200, 201)； the system further comprising a controller (500) configured to obtain from the motion sensor (503) measured movements of the limb (103)； to derive therefrom a movement pattern； and to select the related condition from the electronic library (504).
