Thanks everyone. I think that is what they are doing. The vet mentioned that the previous antibiotics may not have been the correct ones to kill the bacteria that's actually there, so I think that's why the sterile urinalysis was done (as opposed to last time when we collected a cup the "old fashioned" way!)
Apparently, my family was advised to give Boo 4 anxiety pills today (as opposed to the two that she been prescribed for the last visit). Despite being heavily dosed with doggie Xanax, she still balked at the walkway and my brother had to carry all 60 pounds of her into the clinic. No "Boo attempts to bite vet" stories this time though... so I guess that's a plus.
But I promise, she
is a good dog! Just check out her trick thread!