How Much Water Should a 45 lb Dog Drink a Day?

45 fl oz/day

45 lb dog · ≈ 5.6 cups · 1.33 litres per day

Daily water for a 45 lb dog

Situation	fl oz	Cups	Litres
Typical day	45	5.6	1.33
Low (wet food diet)	22	2.8	0.67
Hot day / active	68	8.4	2.00
Upper normal limit	90	11.2	2.66

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

How much water should a 45 lb dog drink?

About 45 fl oz (5.6 cups, 1.3 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 90 oz (2 oz/lb) a day can signal diabetes, kidney disease or Cushing’s – see your vet.