Dogs in the German Armed Forces, 1939-45?

[Sid Guttridge]

I have just found this unsourced on the internet:

"It is estimated that by the time the United States got involved in World War II, that the Germans had trained 200,000 military and police dogs.

They also provided 25,000 trained military dogs to their ally, the Japaneses, that were used in their war effort against the Chinese."

What did the Germans actually train dogs for and in what numbers?

Is the export of 25,000 to the Japanese for military purposes at all plausible?

Cheers,

Sid.