How much water should your dog drink?

It seems such a simple question. Just like humans, all dogs are different.
However, on average, a dog should drink about 50 ml water per kilo per day. So, for example, a 10 kg dog needs a half a litre of water every day. Best is always to have enough clean water by their food. If you notice they don’t seem to be drinking or quickly needed more refills, it’s a good idea to contact your vet.