The goal of the study was to gain insight into facility usage and hen behavioral needs throughout a 24-hour period when there were no obvious retraints. Commercial laying hens that had not been beak-trimmed and that were 18 weeks old were allocated to pens providing nest boxes, drinkers, feeders, perches, sand, and wood shavings (also called commodities). Behavior analysis was carried out in order to gain insight into the temporal and sequential structures of behavior. Video analysis was conducted for 10 days and behavior analysis was conducted on 5 birds for 5 days. Hens spent 97 % of the day on nest use, preening, drinking, feeding, still, walking, perching, and resting. Behavior involving a commodity was carried out for 43 % of the day, while non-commodity-oriented behavior was carried out for 57 % of the day. Around 70 % of the behaviors were short, lasting less than two minutes. The behaviors were also frequent, with about 70 % of the inter-event intervals being less than 40 seconds in length. The preferred place for attack, escape, flying, resting, walking, and wing flapping was the pen corridor. Feeding-drinking-feeding, preening-resting-preening, scratching-resting-scratching, dust bathing-resting-preening, or dust bathing-resting-wing stretching-dust bathing were the preferred sequences of behavior. Behavioral events were clustered, even though hens interrupted ongoing behaviors and changed behaviors frequently.
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