Oh my goodness Dena! I am so sorry you are going through this with little Natalie again! I wish I knew more about this condition, but sadly I don't, so all I can offer you is my full support.
I do think that having the ultrasound as soon as possible is a very good idea. I know that Banfield is an excellent facility and did a Google search for a location in your area and found this:
http://www.banfield.net/health/searc...&submit=submit
Here is a copy of their info from their website:
"
Oklahoma City South (405) 682-8387
1417 W I-240 Service Road,
Oklahoma City, OK, 73159"
How stressful for you, and so sad that it is happening the same time as bringing little Gracie home.
Please know that my thoughts are with you,
Lauren