Philippa Davies, 22, from Westward Ho in Devon, said her beloved pet died of shock after fireworks were set off in the street near her home on Bonfire Night.
She can be heard crying as she sits in hay and strokes the paw of her fallen friend, Hobby, in the clip.
She said: "This is why fireworks should be banned.
"Last night they were let off. Pretty much right next to our barns. And he was fine last night."
Above the video, Ms Davies said she was "heartbroken" at the loss.
"He had many happy, happy years left to live with his friends."
Ms Davies also said people need to be more considerate when setting off fireworks near livestock and animals.
She said: "I lost him because of you. Fireworks need to be banned because people are irresponsible and always will be.
"People need to be aware of the dangers of letting fireworks off next to livestock and animals.
"Our horses were going ballistic as well. Lucky they are all okay. I have never had any problems as no one has let fireworks off next to our fields before.
"Most people know there are horses everywhere around us."
The video, which was posted to Facebook, has now been viewed more than 12,000 times.
Facebook users offered their condolences.
One wrote: "I'm so so sorry. He was such a mischievous little dude. This is why fireworks should be for one night only. People don’t think of others and all those poor animals."
Another said: "RIP Hobby. Luckily my dogs and horse are fine with them but yes, it’s a big issue."
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