According to the operator, more than 55,000 animals are said to have been killed in a fire in a pig breeding facility in northeast Germany.
The fire broke out on Tuesday in the facility in Alt Tellin in northeast Germany.
It spread quickly, partly through ventilation shafts, and destroyed the stalls in which the animals were kept.
The cause of the fire remains unclear.
A spokesman for the operator LFD Holding, Ralf Beke-Bramkamp, told the German news agency dpa that more than 55,000 animals had died.
At this point there were about 7,000 sows and 50,000 piglets in the facility and only about 1,300 animals were rescued.
The plant in Alt Tellin was one of the largest of its kind in Germany.
Groups of demonstrators gathered on Wednesday carrying posters with slogans such as “Stop animal torture”.