> 0.05; Table 2). Isabel and Santos [13] fed diets
containing OA salts (propionic and formic acid)
and found no differences in BW compared with
the BW of control birds; however, an increase
in FCR was observed. On the basis of the data
herein, it may be more beneficial to include OA
in the water than in the feed.
Overall Performance. For both experiments
1 and 2, percentage of mortality did not exceed
5%. In addition, no treatment performed significantly
better than the respective control for any
performance variable except for d 21 bird BW
(P < 0.05; Tables 1 and 2). Because the only
performance differences were observed on d
21, but were not continued from d 21 to 49, it
does not seem to be cost effective to use any of
the products tested in experiments 1 or 2 based
solely on performance. The authors are unaware
of publications that have focused on organic or
pastured poultry and appropriate inclusion rates
for the products used in this study. Manufacturers
of the PRO1, PRO2, and MOS recommend