How Much Water Should a 90 lb Dog Drink a Day?

90 fl oz/day

90 lb dog · ≈ 11.2 cups · 2.66 litres per day

Daily water for a 90 lb dog

Situation	fl oz	Cups	Litres
Typical day	90	11.2	2.66
Low (wet food diet)	45	5.6	1.33
Hot day / active	135	16.9	3.99
Upper normal limit	180	22.5	5.32

Rule of thumb only; wet food supplies part of the water. Puppies need water available at all times.

How much water should a 90 lb dog drink?

About 90 fl oz (11.2 cups, 2.7 L) a day – the common rule of 1 oz per lb of body weight. Hot weather, exercise, nursing and dry food raise it.

When is drinking too much a concern?

Consistently more than about 180 oz (2 oz/lb) a day can signal diabetes, kidney disease or Cushing’s – see your vet.