The aim of this research is to evaluate the effects of light intensity and the temperature-humidity index (THI) on egg performance and growth rate in laying hens reared on different cage tiers. Additionally, the study seeks to un-derstand the sensitivity and efficiency of chickens' comfort conditions under various climatic environmental conditions. Brown layer Hyline Brown hens were used as the animal material. In the experiment, 392 hens were housed in a total of 56 cages, with 7 hens per cage in a 4-tier cage system. During the experiment, live weights, growth rates, egg pro-duction, and egg weights of the hens were recorded and correlated with the THI and light intensity values measured in front of each cage. The results indicated that hens on the upper tiers had higher live weights, body weight gains, growth rates, egg production, and egg weights compared to those on the lower tiers. A negative relationship was found between the THI value and both growth rate and egg production. Increasing THI values negatively affected both body weight and egg production. Significant positive relationships were observed between light intensity and egg weight, egg production, and average egg production. In conclusion, environmental management and physiological factors are crucial in optimizing the performance of laying hens. Appropriate housing conditions, including optimal light intensity, and temperature management, are essential for maximizing both growth and reproductive performance. Additionally, achieving an ideal body weight at the beginning of the productive period is a crucial for egg production.

This research aims to assess the production and oxidative stress reactions of lambs fed in a specially designed cage for creep feeding. For this purpose, the Akkaraman lambs (n = 60) were separated into four groups (15 individuals by two sexes and two groups), and all were fed the same ration. On the days that all the data was collected, the lambs were precisely 20, 34, 48, and 62 days old. The study included collecting data on body weights, body measures, and saliva samples from lambs. When the change in body weight was investigated, the results indicated that the differences between caged creep and control feeding groups (P = 0.343) and among the groupings concerning gender (P = 0.735) were insignificant. The importance levels of change differences in body measurements based on feeding methods and gender are withers height: P = 0.003, P = 0.198; body length: P < 0.001, P = 0.394; pectoral chest width: P = 0.030, P = 0.906; chest depth: P < 0.001, P = 0.741; chest circumference: P = 0.093, P = 0.529; back length: P = 0.221, P = 0.935; head length: P = 0.004, P = 0.072 and head width: P = 0.112, P = 0.617 calculated. The study's saliva samples, the effects were examined, and significant differences in Malondialdehyde (P = 0.014), superoxide dismutase (P = 0.029), catalase (P < 0.001), and glutathione s-transferase (P = 0.001) were discovered between control feeding and caged creep feeding methods. In ischemia-modified albumin (P > 0.05), the difference between the groups was insignificant. According to these findings, caged creep feeding systems are preferable for achieving faster growth rates in Akkaraman lambs; however, caged creep feeding techniques in bigger areas with longer periods are considered better for welfare conditions.

The study was conducted to investigate the effects of handling (use of sticks and ramp), transport conditions (last water and feed consumption time, loading density, transport distance, driver experience, lairage period, a livestock trailer covering, climatic changes), and individual animal characteristics (age, sex, breed, body temperature, blood parameters) on meat quality parameters (cooling shrink, pH30min, pH24h). During this process, in which transport conditions were evaluated, a total of 357 cattle was transported at an environmental temperature of − 24/25°C over distances ranging from 5 to 176 km. In order to determine meat quality parameters, pH values at 30 min and 24 h post–slaughter, color measurements at 1 and 24 h, and cooling shrink were recorded. The effect of transport conditions on meat quality parameters obtained as a result of the study was analyzed using a hierarchical regression model. Cold stress is associated with cooling shrink (β = − 3.048; p < 0.01). The increasing value of pH30min is linked to decreased lairage environmental temperature (β = − 1.453; p < 0.05) and transport start zone environmental temperature (β = − 3.196; p < 0.01). It was thought that animals unable to maintain their body temperature had higher pH30min values. Decreased carcass pH24h value was associated in animals transported in covered a livestock trailer (β = − 0.125; p < 0.05). Transportation of animals for slaughter in cold climatic conditions was thought to cause stress, which negatively impacts meat quality parameters.