lab has developed a lump

Question
Hello, I know you are not a vet but I have a question that I hoped you could help me with as I can only take her to a vet in several weeks....

My 1 yeay 3 month old female lab is not yet spayed and shares her home with a 4 month old male jack russle terrier who is not yet neutered, they get along well always chewing on each other, chasing each other and the like, recinitly I found that my lab has a lump under one of her teats on on last row towards her bottom, its about three inches lnog adn a inch wide, its sort of hard and when I went to dubble check whiel she was lieing on her side the other night she sprune up when I touched it... not sure if it hurt or it I just spooked her, could this possibly be something causd by the russle chewing on her? what would it be?  I am taking her to a vet to be spayed within three/four weeks I will have htem look at this then but until then I'd like to know what it is, there doesnt seem to be a bite mark or anything near the area thou there apperas to bea small pimple like thing just below her teat that its under, any ideas of waht it could be or web links would be great, thanks.

Answer
I am surprised such a young dog having a lump.  The behavior is quite typical for dogs that age, and seldom causes problems.  I doubt it is anything that can't wait a few weeks.  You might call the vet and ask about it.  Of course, their usual response is ''Better bring her in.''  The vet maybe able to remove or repair whatever it is while she is under for spaying.  Sorry I can't help more.