Like humans and animals, plants need both water and nutrients (food) to survive. Most all plants use water to carry moisture and nutrients back and forth between the roots and leaves. Water, as well as nutrients, is normally taken up through the roots from the soil.
So, for example, a 3-month old puppy should be able to hold its urine for approximately 4 hours in a pinch. This means that if you have a properly toilet trained 4-month-old puppy that, theoretically, can hold its urine for 5 hours, and you shut that puppy in a crate for 6 or 7 hours, you are courting disaster.
A dog can only hold themselves for so long! The general rule is that a puppy can hold their needs for the hours that equal their age. For example, a 3 month old Shih Tzu can hold its needs for 3 hours and so forth. Once your Shih Tzu is 1 year old, they should be able to wait for 8 hours.If you will be gone for longer than that, it is best to have a friend, neighbor or family member bring your dog out for a walk. The Shih Tzu brothers: Min Su (black) Je Ju (white), 18 months.nce your Shih Tzu is 1 year old, they should be able to wait for 8 hours. If you will be gone for longer than that, it is best to have a friend, neighbor or family member bring your dog out for a walk. The Shih Tzu brothers: Min Su (black) Je Ju (white), 18 months.