Overtired reads as wild rather than as sleepy, which is why it is so reliably misdiagnosed as a behaviour problem and answered with more exercise — the one intervention that makes it worse.
The overtired puppy
Bitey. Zoomies at six in the evening. Ignoring cues they knew perfectly an hour ago, and getting louder the more you ask.
It is the same second-wind meltdown a toddler has past bedtime. A puppy at this age cannot regulate itself down out of that state, which means the adults in the room have to end the party rather than wait it out.
The enforced nap
Every couple of waking hours, put the puppy somewhere calm and boring — a crate or a pen — whether or not it looks tired. Most crash within minutes, which is itself the evidence.
A predictable wake, play, potty, nap cycle turns a frantic puppy into a calm one within days, and it is the backbone that everything else in the day hangs off.
How it changes with age
Night sleep lengthens on the same curve as bladder control, which is why the two improve together and why neither can be hurried on its own.
- Young puppy — roughly eighteen to twenty hours a day, in many short stretches.
- Through the first year — settling toward fourteen or fifteen hours.
- Grown dog — around twelve to fourteen hours, which is still more than most owners expect.
One caution
General guidance, not veterinary advice. A sudden change in how much your puppy sleeps — in either direction — is worth a call to your vet rather than an adjustment to the schedule.