Take 2! My original response bombed so here we go again. Hope it doesn't double post...
You are right to be concerned. I have never seen a flea bite reaction of this sort, but what do I know? I'm no vet, just had dogs for many years :-)
How quickly did this growth appear, and how large is it? The possibility of it being a malignancy is certainly reasonable. If it turns out to be benign, there are still problems looming ahead. These growths tend to be very tempting for dogs to "worry" at, and can result in bleeding and infection. Since it is between his toes, it could eventually get large enough to change your dog's gait and cause even more problems, so go ahead and have your vet take a look at it.
You can contact Dr. Aleda Cheng, DVM free here at Med Help as well. She generously volunteers her time so there is no charge. To access the forum, look on the right side of this page under Related Expert Forums and click on Pet Health.
I read your advice about contacting Dr Cheng and haven't been able to find her. Can you help me?
Scroll down this page past Community Members and you'll see a small box that says "Related Expert Forums" then click on Pet Health. That takes you to the Ask a Vet forum.
You can also access it from the home page. Scroll down until you see a listing of Pet Forums and click on Pet Health. There you can post your question to Dr. Cheng.
what did you find out? my olde english bulldogge has the exact same thing just started about a week ago.
Because this is a really old thread (from February 08) it is just possible you won't get an answer from the person who started this thread.
It might be better for you to start an entirely new thread of your own with this question? I think you will get a better response if you do.
If you go to the top of the page you will see a green box saying "post a question" Click on it, then you can go ahead.
Anyway, my suggestion about any new growths that are found anywhere on a dog, is to take the dog to the vet. Then you will know for sure what it is, and whether or not it needs to be removed. That is always worth doing, for peace of mind.Many many growths are not cancer. But you have to know.