The animal became trapped in a circular feeder on land in Muchelney, Langport, at around 4pm on Saturday.
A crew from Somerton and the Special Rescue Team from Bridgwater both attended the scene.
But after unsuccessfully attempting to free the bull for more than 40 minutes, a vet was called and the animal was sedated.
A Devon and Somerset Fire spokesman said the animal was eventually freed at 6pm after specialist cutting equipment had been used.
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