If you can see the pus, don't worry about taking any pictures. The pus there means she has a sinus infection. Some people on BYC have said to inject Tylan directly into the infected area to cure it, but I have not tried that. In my limited experience treating birds at the feed store, you have to physically get the pus out. I can probably help you through this, but you'll need to be brave. There are two at the feed store with sinus infections that I'm going to treat, so I can take pictures and post them.I tried taking pictures tonight but the lighting was poor so they didn't come out. I will try again tomorrow during the day. However, yes the inside of the mouth has pus like your bottom picture shows.