Dutch broiler chicken of the 'one-star Beter-Leven' label were tested. The birds, a slow growing strain (JA-757, Hubbard), are kept under semi-organic management conditions. 

Tests were performed in four flocks of three weeks old and two flocks of five weeks old broiler in the morning and evening hours and each time at four different predefined locations in the house (I- IV).

Figure: Non-scaled figure of a Dutch chicken house, with the roofed winter-garden, the main entrance doors and feeder/ drinker lines. For experiment one, the chicken house was divided into four test locations (I: Entrance area/ close to the main door, II: Entrance area / close to the winter-garden, III: Back area/ close to the winter-garden, IV: Back area/ at the wall side) in which both, the ADT and the STP were performed.

This experiment was performed with Danish broiler chicken from different producers of the 'Majs Plus' label (Rose Poultry), located in Denmark. The birds, a fast growing strain (Ross 308-broilers), are kept under intensive management conditions.

For this study, nine flocks were tested twice a day and at three different ages (6-12d; 20-24d; prior to slaughter) in the rearing cycle.  Tests were performed:

Twice a day

• ​Morning (07:30 – 10:30)
• Evening (17:30 – 20:30)

A t three different ages during the rearing cycle   

• Age 1 (d 6 – 12)
• Age 2 (d 20- 24)
• Prior to slaughter (d 33 – 35)