To the best of my knowledge they are neutered as well as given a procedure to eliminate bloat as well. The air force has a Malinois breeding program at Lackland. Obviously these are not neutered
The AF had a breeding program @ Lackland back in the 1960’s and 70’s. They were called Sentry Dogs, and I think that they were bred from German Shepherd Dogs mainly. Search USAF Sentry dogs, there is a lot of info there.