@article {10.3844/ajavsp.2015.197.201,
article_type = {journal},
title = {Do Cows Under Subacute Ruminal Acidosis (SARA) Attempt to Self-Medicate?},
author = {Hendriksen, Erin and AlZahal, Ousama and Wright, Tom C. and McGinnis, Alexandra M. and McBride, Brian W.},
volume = {10},
number = {3},
year = {2015},
month = {Sep},
pages = {197-201},
doi = {10.3844/ajavsp.2015.197.201},
url = {https://thescipub.com/abstract/ajavsp.2015.197.201},
abstract = {The objective of this study was to examine feed-sorting behavior of dairy cows in response to a grain challenge that leads to Subacute Ruminal Acidosis (SARA). Sixteen multiparous, rumen-cannulated lactating Holstein cows were used. During the first 49 days of the experiment, all cows received a High-Forage diet (HF; 77:23, F: C; NFC=35). Cows were then transitioned to a High-Grain (HG; 50:50, F: C; NFC=48) diet on days 50 and 51 and remained on the HG until day 72. Feed intake was recorded daily. Particle size distribution of feed and orts were analyzed using the Penn State Particle Separator (PSPS) on days 36 (HF) and 71 (HG). The extent of feed-sorting was evaluated by calculating sorting indices for each PSPS dietary fraction for each given diet. A sorting index of a given fraction of the PSPS was calculated as the actual DMI expressed as a percentage of the predicted DMI of that fraction. Ruminal pH was recorded continuously every minute using an indwelling system on days 36 (HF), 50, 51 (onset of SARA) and day 71 (chronic SARA). Data were analyzed using Proc Mixed of SAS with day as a fixed effect and accounting for repeated measurement. Orthogonal contrasts were utilized to compare days. Ruminal pH on day 36 (16±46 min/d },
journal = {American Journal of Animal and Veterinary Sciences},
publisher = {Science Publications}
}