My zebra finch has a bubble on the pad of her foot, is this a pox ? How may I treat this ,Ive started using Neosporin gel with a Q-tip to soften it ,it's a good size and we have separated her from other's so she doesn't get hurt.

Optional Information:
Age: <1; Female; Breed: zebra finch

Already Tried:
neosporin gel to soften bubble and seperate cage,she had this before and I treated the same but it came back../p>