Normal behavior for a pac. Do you have plenty of hiding places for her in the cage? You could also cover three sides of the cage with a solid background of some sort. If she has hiding spots and can't see too much of what's going on in the room around her she'll probably stop lunging at the glass when people walk by. Some of them are always aggressive when there's food near.





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The lunge against the glass was like a Saturday morning cartoon haha 
Even though he's a little guy and should be fed every day he does the same thing, lunges at anything he particularly see's as "food." I can only assume that the way the breeder fed these little guys is what's responsible for the more aggressive nature. Much like yours he's also highly aware of his surroundings, including what's outside his carrier. I've placed my container of worms right next to his carrier and he was so eager, jumping at the side of his carrier trying to get closer to the worms outside.
