My dog is acting strange. About 4 days ago, he refused to go upstairs, so now I have to carry him at bedtime, he shakes and his ears go down like he's frightened to death.
He has always followed me up and down the stairs because he likes to be with me, but now he refuses to use the stairs that go up to the second floor. It's weird because he's not old or anything, he's not in any pain, and he will go downstairs to our basement no problem.