It is probably an egg. Do you know how to care for eggs? If not an economical way to incubate them is to put them in a small plastic container with small air holes and about 2in of moist vermiculate put the container in the cage out of direct light if they are fertile they should hatch in about 45-50 days. :wink:
depending on the size of the bump and exactly where it is positioned...are you able to provide a picture?
