Chemistry is a branch of physical science that studies the composition, structure, properties and change of matter.
Daily water consumption varies quite a bit. Season of the year, workload, reproductive status, diet, and climate factor into the volume of water needed by a particular horse on a specific day. As a starting point, the average horse drinks between 5 and 10 gallons (19 and 38 liters) of water each day. The horse may need slightly less if it is grazing lush pasture because fresh grass contains a high percentage of liquid.
Re: How many litres of water are you horses drinking each per day atm? A lot :S I would say 25% more than usual if that helps. I have a large plastic bucket, comes up just above my knees and is about 60cms wide (at a guess) and am having to refill every 24 hrs.