Comparing the dog being weighed and immediately competing vs. a guy making weight and rehydrating over a 24 hour period is pretty much apples and oranges. One the human only has to make a certain weight. He then competes at a different weight so he can actually go down to unhealthy levels, levels he could not perform at, and then rehydrates to a weight where he can compete. The dog must be brought to a weight with a 'certain amount of water' and then compete at that weight.

Picking the correct weight with a dog is far more important because the dog actually competes at this weight. The human can make weight and rehydrate 10-15 pounds or more in a 24 hour period.

And like Jack said, one has to be careful with the terminology. Drying out and dehydrating are two different things. Just as dehydrating and dehydrated are two completely different things. One is a process and one is the end result.

EWO