The spleen is from a local farm which was a big plus since I'm familiar with the place.
The store also had cheap beef and pork liver.
I only bought the spleen and brains since I have lots of lamb liver, chicken liver and lamb kidney from the raw co-op and plenty of beef kidney still. I have to make sure to save room for that 120 lb. of elk and venison that will come in next month.
We're going to start feeding her the many lamb legs I picked up. She's had lamb before, it was her 1st raw food, so I don't think there will be any problems with the lamb and we'll be able to introduce it faster. Then we'll start introducing the spleen.
Once she's good on the spleen we can introduce the brains.