Individual identification is a common method used in animal research. This study was designed to examine if commonly used identification systems (i.e., leg bands, wing bands, neck tags, and livestock markers) have different effects on hens' behavioral and physiological homeostasis. At 18 wk of age, hens were paired in all combinations of treatments and control (unmarked hens; n = 10) in a novel...

Non-cage housing systems, such as the aviary, are being implemented by the laying hen industry, including in North America, in an attempt to improve the welfare of hens. Perches are a resource that is consistently included in aviaries. Hens are strongly motivated to perch, and perching can improve leg bone strength. However, hens may prefer elevated perches, particularly at night, and thus simp...

This study aimed to determine the effect of sugar apple leaf extract (Annona squamosa l) on production performance, carcass and digestibility roles layer tife. The experimental design used was a completely randomized (CRD) with 5 treatments 4 replications, where each replication 3 male laying hens aged 2 weeks so that total 60 chickens were used. treatment administration through drinking water,...

This study was carried out to determine the most suitable model for egg weights of Cubic, Gompertz, Logistics, Gamma, Richard, Piecewise Quadratic, Orscov, and Sigmoaidal models, which are widely used in estimation. Lohmann-Brown Classic laying hens raised Ondokuz Mayıs University Research Application farm were as animal material. In modeling 351 layer 3-storey cages, individual weight data mea...

Abstract Background Poultry red mite (PRM) ( Dermanyssus gallinae ) infestations are a cause of anaemia, impaired productivity and stress-related behaviours linked to reduced hen welfare. A study investigated the potential health, welfare benefits following fluralaner treatment eliminate PRM from infested hens. Methods PRM-infested layer house was selected on free-range farm (5400 hens) an avia...

Four groups of Dekalb Delta commercial layer hens (8 hens per group) were reared individually in cages in an isolation unit. At the age of 8 weeks, groups 1 and 2 were vaccinated with 9R Salmonella gallinarum live (9R live) vaccine. At the age of 18 weeks, group 1 was re-vaccinated with 9R live S. enteritidis vaccine, while groups 2 and 3 were vaccinated with S. enteritidis bacterin. At the age...

This study aimed to examine the nutrient utilization of rump round meat and lotus root using young (32 wk) and aged hens (108 wk) as an animal model. Rump round meat and lotus root were prepared with or without enzymatic treatment. For each age group of laying hens, a total of 24 Hy-Line Brown laying hens were randomly allotted to one of two dietary treatments with six replicates. For rump roun...

For evaluation of the filling and emptying of the alimentary tract, broiler breeder hens were cooped and processed over a 2-d period. Hens were fed at 0600 h on d 1 and after access to feed for 0, 2, 4, and 6 h were placed into coops. Half of the hens from each pen were either immediately processed or were held in coops over-night and processed the following morning, d 2. The alimentary tract w...