A Bronx man will spend a year behind bars after prosecutors said he brutally beat a puppy so badly it had to be put to sleep.

Dwayne Gentles, 29, was convicted in July for abusing the 4-month-old pit bull. Prosecutors pointed to the pup's 13 broken ribs, two broken femurs, broken teeth and a fractured job.

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Investigators said the dog — found emaciated and ridden with fleas — had internal injures from from blunt force trauma, as well as severe neurological damage.

A jury convicted Gentles within 15 minutes last month after hearing testimony from the Bronx man's neighbors about the unnamed puppy's cries and whimpers.

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The dog was euthanized shortly after Gentles took the dog to a veterinary clinic in late December, where doctors said it should be put down after they saw it was barely conscious and could not walk.

Gentles' one-year sentence was the maximum allowed for his misdemeanor charge of injuring an animal.