Animal welfare authorities in California are seeking whoever is responsible for abandoning an emaciated horse near a rural road in the city of Ontario earlier this week.

Mamma

"Mamma" was euthanized Sept. 15 after she failed to respond to treatment.

Inland Valley Humane Society and Society for the Prevention of Cruelty to Animals Investigator Beth Les said that on Sept. 13, a passing motorist spotted the Quarter Horse mare tied to a tree

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