This research was aimed to determine the potential breeding dans of cattle at different age based on body weight (BW), chest circumference (CC) and body condition score (BCS) of 440 cattle from 29 breeding groups in Urut Sewu which included Mirit subdistrict, Ambal, Bulus pesantren, Klirong, Petanahan, and Puring subdistrict. The study applied a survey method allocating two age groups: U1= 18 - 24 months and U2 = >24 - 36 months. The observed variables were BW, CC and BCS. The collected data were subject to an Independent sample test (t-test). The result showed a highly significant difference (P<0.01) between U1 and U2. The average BW, CC, and BCS of Kebumen "Peranakan Ongole" (PO) cattle in U1 were 306.04 +/- 67.86 kg, 153.99 +/- 11.74 cm and 3.18 +/- 0.41, respectively, and in U2 were 368.00 +/- 97.79 kg, 163.10 +/- 14.38 cm and 3.48 +/- 0.58, respectively. The body condition score of Kebumen PO cattle was higher than in the Indonesian National Standard (SNI); therefore, PO cattle had an improved grade as potential germ plasm of indigenous cattle in Indonesia.
