Can You Help Us?

A friend of ours wrote to us asking for help.
This is her story:

I purchased a bike trailer for my dog last week hoping to take her for some bike
rides. The trailer came with tires that had not been inflated. To
make a long story short, I put too much air in one of the tires and the tube
popped. It made a VERY LOUD pop. I was sitting in the front seat while my dog
was in the back seat with her head resting next to the tire before it popped. My
ears were ringing for a little while. It happened at a gas station, and the
noise was so loud that the taxi driver that was parked few feet away from me
with all of his windows closed came over to ask me if one of my car tires had
exploded.

After the incident, my dog stopped responding to voices. She was not in shock
or anything as she was still eating treats, throwing her ball up in the air, but
she just did not respond to any voice commands. She would readily respond to
hand signals. She also did not respond to words like "kitty, squirrel, mouse,
crow, etc" would normally have made her go nutty.

It is obvious that she has hearing loss, but does anyone know if it's permanent
or temporary? And if its temporary, how long before her hearing comes back? She
is still not responding as of now (Sunday afternoon, 24 hours post incident). I
feel so sad, so guilty, I caused this to happen, she's so innocent, and now
can't hear all the words and sentences that she loved to hear prior to this
happening. Today was the first time in a long time that I did not see her
happy dance when I asked her "do you want to go for a walk?". No response to
doorbell being rung......

Thank you for listening.... any insight is greatly appreciated."

We so want to help her! Does anyone have any experience with something like this?

Thank you in advance.

Love ya lots,
Maggie and Mitch