This is BS. The Egyptians would never have put cats in harm's way; they had laws against causing cats any harm or stress.
Bubastis was destroyed by the Persians in 350 B.C.
Ironically, the Persians DID use cats in battle. When the Egyptians were at war with the Persians and the Egyptians were wearing down the Persian army, a Persian general came up with a plan. Because he knew of the great love and reverence with which the Egyptians treated their cats, he ordered his soldiers to capture as many cats as possible from the city. When they had enough, they returned to the city of Pelusium and lined up for battle. When the dust cleared, the Egyptians were horrified at the number of their terrified cats that were running over the battlefield. Rather than harm the cats, they surrendered the city to the Persians without a fight. It was a devastating loss for the Egyptians (Coll, 1997).