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.
Usually a 2 month old Yorkie puppy can hold it in for 3 hours so you might want to take your baby outside twice through out the night. Sometimes even after taking the puppy outside he/she might still cry for need of attention, don't take the Yorkie puppy out but try and soothe by letting your puppy smell your hand.