This study was conducted to determine if cattle could discriminate between two familiar herdmates. The ability to discriminate is necessary for animals to form affiliative relationships (friendships) with other cattle in their herd. It is also helpful, although perhaps not essential, for the formation of stable social structures or hierarchies within the herd. Six heifers were used and trained to distinguish between two herdmates in a Y-maze. Approaching one herdmates resulted in a reward, while approaching the other did not. All of the cattle quickly learned which animal was linked to the reward, indicating that some form of discrimination occurred. When animals were given a second task, of learning the discriminate between two additional herdmates, they were slower to learn the task. There appeared to be some carryover effect that caused confusion in the animals. This is a fairly basic study examining the basis for social behaviour in herds of cattle, but nonetheless produced some unexpected results in that the second test took longer than the first.