The RSPCA is appealing for information on who dumped a horse at the side of a slip road off the A13 near Stanford-le-Hope in Essex.
The body of the piebald mare and her foal were found by police yesterday afternoon (23 April).
They were lying on the verge of a road leading off the B1007.
RSPCA Inspector Steven Craddock said:
“We believe they were dumped around teatime on the 22 April.
“If anyone saw a vehicle or horse box