Research Article
Oregano Extract Added into the Diet of Dairy Heifers Changes Feeding Behavior and Concentrate Intake
Table 2
Ethogram with the description of behavioral activities performed by dairy heifers when fed with Oregano extract at the feed bunk.
| Behavioral traits | Brief description |
| Latency to visit the feed bunk | Time elapsed since heifers entered the stall in the morning until they put the head in the restrainer (minutes) | Latency to eat the concentrate or silage plus hay | Time elapsed since heifers put the head in the restrainer until they start to eat the concentrate or silage plus hay (minutes) | Time eating the concentrate or silage plus hay | Effective time spent eating the concentrate or silage plus hay without pauses (minutes) | Vocalizations of low magnitude | Number of vocalizations performed with the mouth almost closed during their restrained period at the feed bunk | Vocalizations of high magnitude | Number of vocalizations performed with the mouth wide open during their restrained period at the feed bunk | Sniffing, coughing, sneezing | Number of events when heifer sniffed or coughed or sneezed during their restrained period at the feed bunk | Pauses | Number of times heifers interrupted eating the concentrate during one minute or more during their restrained period at the feed bunk | Tongue rolling | Number of events when heifers rolled their tongue during their restrained period at the feed bunk | Licking the feed bunk | If the feed bunk was licked with abundant production of saliva after concentrate consumption (0 = no, 1 = yes) |
|
|