[Penk]

Hi, my first post here, so I am new to the rforum. Our Yorkie was mated about 6 weeks ago, she was put to a small stud and the breeder confirmed that it looked like she took ok. Now we are confused as to whether she is pregnant or not, her hind quarter looks a little larger and her teats or larger than before, but no sign of movement inside and her temperament seems the same, she is still over active and her diet doesn't seem to have changed. Could it be possible that she may be carrying one pup but she is hiding it well? Thanks in advance.