The hens subjected for different types of stressful situations. By then measure including stress hormones in the eggs and faeces, and to study the appearance of the egg shells have been able to identify several signs of hens’ well-being. For example värpte the stressed hens more eggs that were dented on the top or striped small notches.
– There are so many things that are affected in the body of stress. So it seems not unlikely that it had an effect on, for example, eggshells, says pet agronomist Malin Alm at SLU, who recently defended a thesis on welfare indicators in laying hens.
But is it then to lift the lid on äggförpackningen in the grocery store to see if the hens are doing well? Well, it may be possible, but yet the results of the studies in its infancy, and Alm do not want consumers already be drawing large conclusions from eggshell design.
– We have seen a connection in two studies between deviations and stress. I would like to develop this and carry out more studies in order to ensure the link between stress and such dented peak. There can be many different reasons why eggshells change, not only stress, says Alm.
Through further studies it may be possible for producers to deviations of eggshells as a method of to quickly form an opinion on the welfare of hens prosperous.
– Can one then make different adjustments to get a better animal welfare, it can also provide many other benefits, such as better production and profitability, says Alm .
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