Hormone fluctuation can be caused by many illnesses. Even some types of worm infestation.
Have your Vet run a pre- surgical blood work up or the new cheaper blood test to see if anything is off.. also do a urinalysis . Fecal exam done recently ?
Maybe someone knows the answer to this. I have a one year old girl from a new bloodline. She is a chocolate if that helps. She has had tits that are fat like a human on the back four since about 6 months. She had her first heat at 9 months and they seem a bit larger. The Vet even asked me if she had been bred???? No way she was!
Should I be worried? We were getting her ready to show.
So they existed prior to her 1st season, a drop larger since the 1st season at 9 mo. Then I highly doubt she had a false pregnancy.
It may be her make up from a different line than your used to or it could be something else medically or hormonally related. If your vet didn't know, I would consult with a repro vet to be sure they know what they're talking about.
My feeling is the line has larger mammary glands then your prior line but I'm not a repro vet. You could also do a phone consult with Hutch (email photos prior) for $50 if you don't have a local repro vet.
I hope it's just normal development for her. Can you speak to her original breeder about it?
