Data and code from: Effects of an unblanched peanut and/or peanut skin diet on egg quality, egg lipid chemistry and performance of hens housed in a cage-free environment

Authors: Toomer, Ondulla; Vu, Thien; WYSOCKY, REBECCA - North Carolina State University; MORAES, VERA - North Carolina State University; MALHEIROS, RAMON - North Carolina State University; Read, Quentin; ANDERSON, KENNETH - North Carolina State University

Submitted to: Ag Data Commons
Publication Type: Database / Dataset
Publication Acceptance Date: 9/11/2025
Publication Date: 9/23/2025
Citation: Toomer, O.T., Vu, T.C., Wysocky, R., Moraes, V., Malheiros, R., Read, Q.D., Anderson, K.E. 2025. Data and code from: Effects of an unblanched peanut and/or peanut skin diet on egg quality, egg lipid chemistry and performance of hens housed in a cage-free environment. Ag Data Commons. https://doi.org/10.15482/USDA.ADC/30002362.v1.
DOI: https://doi.org/10.15482/USDA.ADC/30002362.v1

Interpretive Summary: This dataset includes everything needed to reproduce the statistical results in the associated manuscript. The manuscript presents the results of a feeding trial aiming to determine whether peanut skins, an abundant but rarely used by-product of peanut processing, can supplement the diet of layer hens. We found that adding either peanut skins or whole peanuts to hens’ diets led to increased body weights over the course of eight weeks, with very little negative impact on their performance and the quality of the eggs. The results are presented in the form of source code and a notebook generated from the code with graphs to visualize the data and tables of model results.

Technical Abstract: This dataset includes the raw data (.csv), RMarkdown notebook of source code (.Rmd), and document rendered from the notebook (.html) to enable reproduction of the statistical results in the associated manuscript. All exploratory data visualizations and tables of statistical model results are included. The associated manuscript presents the results of a feeding trial with four treatments: layer hens were fed a control diet or diets supplemented with high-oleic peanuts, peanut skin, or oleic acid. Response variables were measured over the course of eight weeks. Generalized linear mixed models include fixed effects of treatment, time, and their interaction, and repeated measures error structure where appropriate. Body weight was significantly greater than the control in the peanut skin and whole peanut treatment. Statistically significant effects of treatment were found for other responses, but overall the results suggest little adverse effects of peanut supplementation on layer performance or egg quality.