My boyfriend is in Australia and I have his 4 female rats. One took a chunk out of Molly's scalp. There's a square half centimeter (just under half a centimeter, really) missing from in front of her ear and I'm pretty sure I'm looking at skull. She doesn't seem upset about it and it's not bleeding. I've cleaned it, put antibiotic ointment on it and put her in an old critter containment so that Rory can't get to her anymore. Should I be taking her to a vet for this? Should I contain the mean rat instead? I'm totally panicked and can't get ahold of Kelvin. He's always going on and on about how rats fight and it's just what they do so I don't know if I should be taking her to the urgent clinic or a vet tomorrow or not. Please someone help me!