So.
Flare flash is terrified by loud, unexpected noises.
So imagine this scenario.
Big storm over canterlot one night. He’s missing from his room.
Sour cherry (his mother) finds him huddled under the stairs with their family pet.
Pet is a great big husky. Just as terrified of the storm as he is, but remaining calm with the young colt on him..
This just makes sense to me, and I love it. They find comfort in each other