We dont like to use dex in that manner of drying out! I can tell when someone lost their cool just because they were a pound over 12-24 hours out!
Dog looks to to dry!
For me i always have to play with their water as they loose lots of it just from work!
They weight is recored every 12hours and before and after work that way i know how much was water weight!
Then might add a cup or two with their feed along with clean water that is left with them for 10Hours and only taken away two hours before work!
I have seen likes of CH Rasco get #4 and pass because of being a pound over and dex till he went from looking like a action figure to looking like a bag of bones!
I say that to say if your going to dry with it master it first!