My dog also has a cyst on her neck, I would imagine one on her foot would be worse because your dog probably always licks it and is bothered by it. My dog is virtually not bothered by her cyst, but people are because they feel it when they pet her and are repelled by the lump which has gotten quite large and then one day it was gone which freaked us out. It is starting to build back up again. I listened to a natural youtube dr. who said you can put castor oil on it, put a warm wash cloth on it daily, also diluted w carrier oil and tea tree oil on it. Going to give it a try. Will be watching the forum to see if anything shows up on here to help us help our furry friends.