I have an old lady who just started hobbling around. Checked her feet this morning and on the top of one foot she has a hard round bump, no black scab. On the other foot she has a toe that seems crooked and is swollen up by the nail. My first thought on the toe was that she may have gotten frostbite at some point this winter? Looking for some advice and opinions. I do know how to take care of bumblefoot but where there's no scab I'm not sure if that's what it is?