Studies using classical conditioning have shown that hens display high frequencies of dopamine-controlled cue-induced anticipatory behaviours in the cue-reward interval when signalling mealworm rewards. However, it is not known whether anticipatory behaviours are reward specific, and whether the opioid system is involved in their control. The purpose of the present study was to investigate (1) …
This study reviews all attributes of feed-food competition and enforced-demands of food of animal origin with the aim of delivering …
In total, 432 thirty-six-week-old laying hens were fed a basal diet supplemented with mannan-oligosaccharide (MOS) or an essential oil mixture …
A 6-week study was conducted to investigate the effects of phytase and hydro alcoholic extract of Withania somnifera root (WS) …
A trial was conducted to study the influence of CP and fat content of the diet on performance and egg …
In organic egg production, forage material as part of the diet for laying hens is mandatory. The purpose of the …
A total of 72 H&N Brown Nick laying hens, 76 weeks of age (moulted at 60 weeks of age), were …
This study was performed with pullets to evaluate the effects of dietary yeast extract on bird performances and feather pecking. A total of 2400, 10-weeks-old pullets were divided into 8 groups: C, R,L and LR are control, feed restriction (from 09h00 to 15h00), litter removal (from 12 to 17 weeks of age) and both feed …
Recent studies in laying hens have shown that feather peckers eat more feathers than nonpeckers.We hypothesized that food pellets containing feathers would decrease the birds’ appetite for feathers and thereby also decrease feather pecking. To separate the effect of feathers from that of insoluble fiber per se, additional control groups were fed pellets containing similar …
As people become more aware of the environmental footprint of different foods, consumers may modify their diets to reduce the …
Enzymes are widely used in feed to improve utilization of nutrients and it is generally acknowledged that phytases, by improving …
The objectives of the study were to evaluate the effectiveness of a reduced-emission (RE) diet containing 6.9% of a CaSO4-zeolite …
Chemical residues may be present in eggs from laying hens’ exposure to drugs or contaminants. These residues may pose risks …
1. The study investigated the feeding of a high oil and fibre diet containing 260 g/kgorganically produced cold pressed sunflower …
Moulting is a natural phenomenon in birds. Temperature variation and photoperiodic changes induce circadian and circannual rhythms, manifested by changes in the neural and endocrine systems, ultimately causing physiological processes resulting in a moult. The concept of induced moulting by feed deprivation arose during the early part of the 20th century as a solution to …
The purpose of this study was to evaluate alternative molting protocols assessing hen welfare and performance during and after molt. Hyline W-36 pullets were housed at 15 wk of age, and their egg production was obtained during this first cycle. When birds were 80 wk, the following molting treatments were applied: a conventional molt consisting …
Dietary molt induction to initiate additional egg laying cycles in commercial laying hen flocks is a wide spread practice in …