I'm wondering a bit about this post, as a "well respected kennel" is referenced - but no names mentioned. While it might be considered "good form" to not mention direct names, I'm a little concerned by someone coming here with such an alarming story, with minimal details and a post count of 1. Jennifer, while I'm not discounting your story, I could see a potential for those opposed to the sport, protection training, or the breeding of dogs to discredit the process (schutzhund) which has produced the most versatile utility dog ever known to humankind.
For this reason, would you be willing to PM the kennel name or provide additional details of your dog? Such as full name, breeders name, etc? Why did you send the dog out to be titled? Were you intending to breed or show it? Did you train or do foundation work before sending your dog off?
You have received a number of honest answers here and I think it would be reasonable to provide further details to validate your experience. I assume this would make sense to you, in that if you were willing to send your dog out to be titled you must see value in the process and would not want to see it possibly discredited.
FWIW, I would consider what you described as criminal animal abuse and would require anyone (as a civic duty) to report the situation to the authorities. (why did you choose not to?) There is no call for starving a dog to train it for schutzhund or any other thing. Furthermore, i can't imagine a "trainer" who felt it ncessary to stave a dog being able successfully title anything, so they are a scammer as well. So by outing the fraud it only cleans up the ranks of the people who truly believe in the sport and the betterment it provides to the breed.
As others state, I will withhold AM breakfast until after AM tracking - which would mean my dog might eat an hour later than normal and the entire meal (same amount as given on a bowl) would be fed, although it may (in part or whole) be placed on the track as opposed to a bowl.
Hope this helps,