Of course, there are some times when crating is not possible due to vomiting or diarrhea.
Always make sure your puppy has eliminated before returning them to the crate.
Any puppy that does not have bladder or sphincter control should not be crated until they gain that control.
Consistency is the key to puppy training.
When they understand what to do, and what to expect, puppies only want to please you.
They will learn and grow quickly when they are raised with love, structure, and play.