My voice became sharp.
He dropped immediately.
His tail went low.
He looked ashamed.
I pointed toward the living room.
“Go.”
Cooper obeyed.
Emma frowned.
“He didn’t mean to push me.”
“I know.”
But I was unsettled.
Cooper had never physically blocked her like that.
That evening, everything returned to normal.
He played fetch.
Ate dinner.
Slept beside the couch.
Then at 9:14, when Emma went upstairs, he followed her.
Ten minutes later, barking started.
Mark groaned.
“I’ll get him.”
He returned carrying Cooper’s collar.
“He was barking at the wall again.”
“What wall?”
“The north one.”
Same wall.
I went upstairs.
Emma was sitting in bed reading.
“What was he doing?”
“Sniffing.”
She pointed.
“Then he scratched there.”
Several faint lines marked the paint near the electrical outlet behind her nightstand.
Mark inspected it.
“Probably mice.”
We had never had mice upstairs.
But houses are houses.
Something gets in eventually.
Mark put two humane traps in the attic.
Nothing.
The next night, Cooper scratched again.
Then the next.
He began refusing to sleep downstairs.
Every time we closed Emma’s door, he settled outside it.
If we moved his bed, he dragged the blanket back.
That was when I started researching canine anxiety.
Changes in environment could trigger behavior problems.
Emma had moved rooms.
Maybe Cooper still considered the old bedroom hers and was confused.
Maybe he smelled something from construction.
Maybe the new space heater made a sound we could not hear.
I removed the heater.
Cooper still behaved strangely.
We unplugged the decorative lights.
No change.
We washed the walls.
Vacuumed behind furniture.
Checked attic vents.
Mark crawled into the attic with a flashlight.
Nothing.
Our veterinarian, Dr. Patel, examined Cooper.
Heart.
Ears.
Eyes.
Bloodwork.
Joint mobility.
Everything normal.
“Any other behavior changes?”
She asked.
“No.”
“Eating?”
“Normal.”
“Bathroom?”
“Normal.”
“Aggression toward anyone else?”
“None.”
“Toward Emma?”
I hesitated.
“Not aggression exactly.”
“What exactly?”
I explained the stairs.
The blocking.
The scratching.
Dr. Patel looked thoughtful.
“Dogs can react strongly to environmental changes.”
“Sounds.”
“Smells.”
“Rodents.”
“Electrical equipment.”
“Something outside a window.”
“Even a new cleaning product.”
“So you think he senses something?”
“I think he senses something.”
She said.
“That doesn’t automatically mean danger.”
Mark focused on the second sentence.
I focused on the first.
For a few days, we became detectives.
Mark unplugged everything in Emma’s room.
Cooper still entered and sniffed.
I moved the bed.
He followed the old wall rather than the bed.
That should have told us something.
Instead, we assumed whatever smell interested him remained in the paint.
Then Cooper began taking Emma’s belongings downstairs.
First, her pillow.