Experiments in which the necks of chicks were taped to inhibit food ingestion showed that sibling aggression increased sharply when the weight of the A-chicks dropped below 20-25% of their potential.
Eksperimen di mana leher anak diikat untuk menghambat konsumsi makanan menunjukkan bahwa penyerangan terhadap saudaranya meningkat tajam ketika berat anak turun di bawah 20-25% dari potensi mereka.