It's up to you whether to take her to the vet or treat her yourself. I'm not sure if the vet would even treat her feet they may give you an antibiotic which you can order online Baytril would be the one to get.
You could soak her feet a couple times a day and see if after 3-4 days you can begin...
If you can post some pictures of these bumbles? Usually it takes quite a few soaks in warm epsom salt water before you can get the scabs to begin to loosen. But get some pictures so we can advise better.