Lump on cats back

Question
We have a pregnant cat who has a very large (about the size of a small orange) lump on her back right in front of her tail above her back legs and are wondering what it could be. It feels very spongy but doesn't seem to bother her when we feel on it. What could it be?  Thanks!

Answer
Hey Frances,
Whatever it is, it doesn't sound good. I would take her to a vet.  She may have been bitten, and it has become infected.  A tumor would be hard, I think.   Have it checked out, it might be something that needs to be removed.

God Bless,
Becky