YES! Big yellow teeth! That is normal. In fact, I've been searching for 2 baby females and was looking at some the other day, they had little stubs for teeth, but they were already yellow. Currently I don't have any more ratties. Mine died a couple weeks ago. Was looking in the pet store, but I think some of their babies were too young to be taken away. The big mama rat was close by and didn't like her girl being taken out! I'd like to find a breeder, but have only found 1 in my area and she currently doesn't have anything available.