Walk past any pet shop and there it is: a little plastic waterfall promising happier, better-hydrated pets. Some animals love one. Others sniff it once and go back to the bath tap. This guide helps you decide whether a fountain is worth trying for your pet, and how big it needs to be if it is.

Do pets really prefer moving water?

Some do. International Cat Care says some cats prefer moving water and suggests a pet fountain, a dripping tap or even a ping-pong ball in the bowl as ways to tempt a reluctant drinker. "Some" is the honest word: plenty of cats and dogs drink happily from a plain, clean bowl, and a fountain is not a medical treatment for anything.

Before you buy, try the free fixes first. Cats tend to prefer wide, shallow glass or ceramic bowls over plastic, filled to the brim, in a quiet spot away from the food bowl and away from noisy machines. If your cat still ignores water, a fountain is a fair next step. Feeding some wet food also adds water to the day, which your vet can help you plan.

Find your fountain size

Pick your pet, enter its weight and tell us about your home. The tool works out how much water your pets might get through and how big a tank covers the days between refills.

2.5 L

Rule of thumb: dogs around 60–80 ml of water per kg a day; for cats we use about 50 ml per kg as a ceiling, which includes water in their food. Your pet may drink less, especially on wet food.
A fountain is a nice extra for pets who ignore a bowl, not a must for every home. Clean water, changed and washed regularly, matters more than the gadget.

Keep it clean, or skip it

Any water bowl should be washed daily, and the University of Guelph's pet nutrition team says to follow the maker's cleaning instructions for fountains so bacteria do not build up. A fountain has more parts, so it takes more care: take the pump apart, scrub the nooks, and replace filters on the schedule the maker gives. Check the maker's guidance on keeping the water level topped up too.

What to look for

Expect to pay around €40–100 depending on size and smart features. Smart extras like apps are optional and do not make water healthier.

When to call your vet

If your pet is suddenly drinking much more or much less, or you notice weight loss, tiredness or changes in appetite, ask a vet. A fountain will not fix a health problem and could hide a change you should notice. Note roughly how much your pet drinks before and after you switch.

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