My working cocker is 2 next month. I can feel glands, either side, in her neck just below the jaw line. They are probably small marble sized and as far as I can remember, they have always been there. They haven't grown. I can't always feel them but when her head is at a certain angle they are very obvious. Health wise she is fit as a fiddle. My friends older dog has sadly recently been diagnosed with cancer and he told me that the first sign was that her glands became swollen. Is it normal to be able to feel these glands or is it worth a trip to the vets?