Aim: Bali cattle (Bos javanicus) are an Indonesian's native cattle breed that distributed in Asia to Australia. The scientific literature on these cattle is scarce. The growth hormone (GH) of Bali cattle is investigated from three separated islands, namely, Bali, Nusa Penida, and Sumbawa.

Materials and Methods: Forty plasma samples were collected from each island, and the GH was measured using a commercial enzyme-linked immunosorbent assay kit. The data were analyzed based on the origin, sex, and cattle raising practices.

Results: We found that the GH level (bovine GH [BGH]) of animal kept in stall 1.72±0.70 μg/ml was higher than free-grazing animal 1.27±0.81 μg/ml. The GH level was lower in female (1.22±0.62 μg/ml) compared to male animals (1.77±0.83 μg/ml).

Conclusion: We conclude that the level of BGH in Bali cattle was low and statistically equal from all origins. The different level was related to sex and management practices. Further validation is needed through observing the growth rate following BGH administration and discovering the inbreeding coefficient of the animal in Indonesia.

Keywords: Bali cattle, growth hormone, Indonesia.

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