Modifiche

Then the pen has been filled with running water. For a comparison that takes into account the liquid remaining in the feeder, the weight was measured several times starting from the first filling of the empty and dry pen, repeating the loading and unloading cycles.

Then the pen has been filled with tap water. For a comparison that takes into account the liquid remaining in the feeder, the weight was measured several times starting from the first filling of the empty and dry pen, repeating the loading and unloading cycles.