Temperament influences maternal behavior and lamb survival inMerino sheep selected for calm or nervous temperament. The impact of thisselection on mother-young recognition and early expression of temperament inlambs is unknown. We tested the ability of multiparous ewes selected for calm(n¼16) or nervous (n¼18) temperament to recognize their own lambs 6 hr afterparturition, the ability of the lambs to display a preference for their own mother at18 hr, and the temperament of the lambs at 1 and 16 weeks of age. Ewes and lambsfrom both genotypes showed a similar preference for their familiar kin. In contrast,differences in temperament were detectable at 1 and 16 weeks of age. Nervouslambs showed higher vocal and locomotor activity than calm lambs. Thus,temperament did not affect the early process of ewe-lamb bonding but mightaffect the quality of the mother-young relationship under more challengingsituations.