My dogs both have swollen neck glances one is 1 1\2 and my puppy is 8 mouth old
You need to get your dog to the vet. Worry about what it COULD be after you find out what it IS. Swollen glands in dogs can be caused by anything from something fairly minor, like tonsillitis (yes, dogs do have tonsils) to very serious illnesses like canine lymphoma (cancer), so make an appointment so that she can be seen as soon as you can. Please let us know what the vet said.
Ghilly