I just recently got back from the vet. Isis looks very good except for a rather large, irregular lump in her abdomen. The vet told me it could be either fecal matter or possibly a tumor. He said he thought it felt more like fecal matter though. We both decided to try conventional means for dealing with impactions (ie. hot soaks, massages, etc.) before considering anything more invasive. I gave Isis a nice hot bath today and dried her off with a blow-dryer. She took it pretty well, so I guess I just needed to show her who was the boss around here 
On a happier note, I showed Isis to Ra today (from the other side of the glass of his tank of course). She didn't really care either way, but Ra approached her and tried to lick at her through the glass (he only licks things when he finds something interesting). He seems to have taken an interest in her. I hope this predicts good things in the future 
Any suggestions about dealing with impactions are very welcome. Thank you everyone. 
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1.1 Mali Uromastyx (Ra and Isis)

