Hi Tony,
My spayed westi/doxi bitch (abt. 9 years old) has been experiencing her lymph nodes swelling and subsiding for at least the last 4 years. It could have been happening before this, but I just didn't realize it.
The vet has run blood tests for several diseases/infections, checked her out for allergies, and switched her foods occasionally. I've tried to notice any consistency when they do swell --has she been exercised, in the bushes, killed vermin recently, changed the laundry detergent, etc.... Can't find any pattern at all for it.
We've both basically given up the search since she's happy, healthy, and thriving. After searching the web, I know that I'm not the only one with this "mystical" occurence. I do realize her body is reacting to something, but what, neither of us knows. I guess it's just a waiting game now. I don't like it, but medicine has never claimed to be an exact science :rolleyes:
good luck with your 'pup'
toodles