29 LOHMANN TIERZUCHT › MANAGEMENT GUIDE 29 feed, but more water in an effort to cool their body down. Check the water quality regularly, especially if you use your own water supply like well water. For example excessive salt levels in drinking water can cause persistent damage to shell quality and hard water with high TDS* levels may cause kidney damage. Grit Feeding grit is not a must but is recommend- ed when rations are supplemented by grains. This stimulates the development of the crop and the gizzard during the rearing period, which in turn has a positive effect on feed intake capacity. Table 7: Amount and Granulation of Grit Dependent on Age Week 1–2 once a week 1g /bird (size 1 – 2 mm) Week 3–8 once a week 2g/bird (size 3–4 mm) From week9 once a month 3g/bird (size 4 – 6 mm) Litter (Non Cage Housing) Only use shavings from untreated wood in order to avoid poisoning and residues in the egg. Provide sufficient ventilation to ensure good litter condition and remove wet litter, if necessary. Egg Quality and Egg Collection LOHMANN BROWN-CLASSIC layers produce eggs of excellent quality. To preserve the quality, the following points should be observed: › Collect eggs at least once a day. › Store eggs at temperatures between 5 °C and 10 °C with a relative humidity of between 80 – 85%. Storing at higher temperatures and lower humidity leads to rapid loss of weight and impairs the quality of the egg white due to an increase in gas exchange. *TDS: Total Dissolved Solids GENERAL RECOMMENDATIONS