Walkers in the Thornhills Lane area of Clifton were shocked at the gruesome sight when the first dead animal appeared and horrified when they saw the second one a few days later.
When the second carcass appeared at the weekend the first was badly decomposing and the stench of the rotting animal was obvious.
Pensioners Bill and Janet Phillips, who regularly walk their dog in the area, were disgusted by what they saw.
They spotted the first animal near the junction with Jay House Lane and initially thought it was a dead foal.
The black and white animal, which was obviously dead, was among foliage and other dumped rubbish.
"Horses are kept in the fields nearby and I was worried it had wandered down there," said Mr Phillips. "There have been drums of toxic waste dumped nearby and water in the brook has been dirty and frothy. I was worried the horse might have drunk from the beck and died as a result."

(Full report in the Brighouse Echo 8/5/2008)