Penny seems to be suffering from 'pancaked dog' syndrome. The basic symptom is a necessity to lie flat out on the kitchen floor, head supported by the floor itself, body flat and motionless - unless someone makes toast, in which case the body leaps to attention and levitates instantaneously across the room to appear beside the bread-toasting human.
The symptoms may be the result of a visit to Kepala Canine Country Club, a visit in which the accompanying human kept throwing the floaty toy into the heated pool, so that Penny had to swim to fetch it. No sooner would she forge through the waves to rescue the lost toy and haul it back to shore than the second floaty toy would be hurled to the other end of the pool. Half an hour of this left her tired but happy, but the human couldn't resist the temptation to try out the fenced enclosure where the agility equipment is set out.
Penny goes to a tricks and agility class each Tuesday evening, but there's no seesaw, so it seemed like a great opportunity at Kepala to use the seesaw and revisit this agility skill. And, of course, who could resist the weave poles?
There's a sandy enclosure, so that invited us also. Penny happily chased the floaty toys, now operating as throwing toys.
By the time we drove home she was ready to relax, and she's been doing that most of the day.
Here's a picture from above: