Welcome to Justanswer! I am Dr. Altman and happy to assists you both today!
I am sorry to hear Becky is having signs of a possible urinary tract infection with increased water intake.
There are a handful of causes of increased water intake in a dog or polydipsia:
1.) A urinary tract infection
2.) Bladder stones that traumatize the bladder and cause bleeding
3.) A bladder tumor, most likely in a senior pet
4.) Kidney or liver changes
5.) Endocrine disease such as Cushing's
Ideally until you are able to get to your veterinarian, please increase water intake. You can do this by supplementing the dry food with water and flavoring the water (maple syrup or no salt broth for example) as well. Increasing the water intake will help "flush" out the bladder and reduce the pain associated with this condition.
Collecting a first morning sample in a tupperware container and refrigerating the sample if more than an hour old to have your vet evaluate the sample will help determine the cause of the blood in the urine.
Your vet will run a urinalysis, potentially do a urine culture to look for bacteria, an X-ray to rule out a bladder stone, and bloodwork to ensure there is not a metabolic cause or kidney issues causing the symptoms
Diagnosing the issue will help determine how best to treat the blood in the urine to get your pet comfortable swiftly
Below is more information on this condition in dogs:
As far as using phenazopyridine for her, this is not a common medication used in dogs and will relay information in regards ***** ***** in just one moment but wanted to get you this information first and foremost
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