At the clinic where I work, we measure urine specific gravity and the total protein in blood serum. The usg refers to the concentration of the urine. I think the ideal USG is 1.020 or 1002. When my dog had struvite crystals, her USG was 1.070. You can buy those chemstrips which you dip in the urine and match the colours. This will tell you the ph as well as other information. Or buy ph strips.
Thanks for the great explanation. I got PH strips today and I checked and her PH is 6.5 the USGravity however was 1.025 Now I don't know if that is bad or not. I plan to take in a specimen and let the vet check then I see how close I came. I am having a heck of a time getting her to drink water!
I had planned on taking her off the prescription dogfood,(Royal Canin SO14) and I bought some Innova. She loves the Innova and they told me it is formulated to keep the ph at 6.5. But since she does not drink enough water (at least I don't THINK it is enough she weighs 14lbs) I am thinking it may be better to keep her on the RCanin, even though she will not eat it unless I mix in a spoonful of cottage cheese.
Okay, Now tell me how to put a picture in my profile so I can show her off...

Thanks everyone for your responses.