A new article on the effects of Progres® has been published in the Journal of Applied Poultry Research. The paper “Effect of resin acid composition on growth performance, footpad dermatitis, slaughter value and gastrointestinal tract development in turkeys” is authored by Professor K. Lipiński, Dr. Magdalena Mazur-Kuśnirek, and Zofia Antoszkiewicz from the Department of Animal Nutrition and Feed Science of University of Warmia and Mazury, Poland, and R&D Director Juhani Vuorenmaa from Hankkija FFI, Finland.

The 105-day experiment aimed to determine the effect of Progres® on the growth performance and carcass quality of turkeys, as well as on litter quality, the incidence of footpad dermatitis, and the structure and function of the gastrointestinal tract.

Six hundred female BIG 6 turkeys were divided into the following three dietary treatments:

T1) Basal diet without Progres®,

T2) basal diet supplemented with Progres® at 0.5 kg/t (starter 1 and 2, finisher) and 1.0 kg/t (grower 1 and 2),

T3) basal diet supplemented with Progres® at 0.75 kg/t (starter 1 and 2, finisher) and 1.5 kg/t (grower 1 and 2).

The birds were raised on litter in groups of 20 birds per pen, under standard housing  conditions. The mash-form diets were based on wheat, maize, and soybean meal. Bird performance was determined on a weekly basis throughout the experiment. Litter quality and footpad lesions were scored on weeks 3, 9 and 15. After the euthanasia on day 105, the birds were measured for carcass traits and the structure and functional parameters of different GIT segments. 


Both dietary levels of Progres® significantly increased the body weight of birds by 1.6% (T2) and by 2.1% (T3) (p < 0.05), and improved the feed conversion ratio and the European Efficiency Index. Moreover, Progres® significantly reduced the incidence of FPD at 9 and 15 weeks of age, and improved litter quality.

The gastrointestinal parameters, including the cecal short chain fatty acid profiles, were not much affected by Progres® in this study, apart from lower weight of the ceca in T2 than T1 treatment. Carcass quality and meat quality were also unaffected by the treatments.

The authors concluded that dietary Progres® amendment improves the performance and wellbeing of turkeys and gives economic benefits in turkey production.

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