She started limping some yesterday and today it was more obvious limping. I saw a little black spot on her foot and soaked her in Epsom salt and managed to get the top of the scab off. I couldn’t get anything else out. I used betadine and Vetericyn and some neosporin. I wrapped her foot and have her in a dog cage for the night. Do I need to do more to try and get the center out? Her foot isn’t swollen.