Hi, did you find out what it was and how did you treat it?
Our Dazee (9.5 yrs Bull Mastiff / Rotti cross) had an 'infection' between her toes (in the webbing) and a small open sore on one toe pad approximately 3 weeks back. The hair on the underside of her foot was red looking compared to blonde on the other feet. We took her to our vet and he said it appeared to be a primary and secondary infection. She was on antibiotics for 10 days with daily foot baths (medicated soap) and wrapping and a sock when we were not home during the day so she could not lick it.
After 5 days she was acting good, walking good and the open sore was healed. We continued the meds and on day 8 a new sore showed up on a different pad (same foot) - we took her back to our vet because it looked worse than the first time and he indicated to keep up the antibiotics and gave us 5 add'l days. That sore heeled up after about 4 days.
I went away for the weekend so she didn't get the foot baths, however still got the antibiotics (last pill was Sunday). On Monday night she was limping bad again, now she has a white raised bump (1/4"+) with tons of little craters on a different toe pad (same foot) the nearest I can compare it to is an ugly wart. Her toe hair on that food is reddish again.
I would sure like to know how your situation turned out. Looks like I'll have to take Dazee to a different vet if she is not better in the next day or so or if she gets considerably worse.
Anxious mom.