I own a 2.5 yr old Male Labrador Retriever, who's been having this problem since some time. On the underside of his left paw, between the digits he's having a lot of redness, and I'm guessing pain, because he has been limping for quite some time now. I have been to a no. of vets with him, and have followed all their suggestions to the 'T' but to no avail. The floor of our house is made of marble, which we were told, initially, may be the cause. So we put him out in the compound for a week, but no change. Then, someone said it may be due to the liquid sanitizer we use to clean the floor, so we made some changes, even stopped using it, but the results were still the same. He's a bit overweight, may be weighs around 60 to 65 kilos. Weight was also apparently said to be a factor so we cut down on processed dog food and are giving him just boiled veggies, pulses and rice mixed together along with buttermilk coz its pretty hot out here in India. No change coz of the food too. Recently, our vet said its a fungal infection thats been persistent for some time, so he prescribed some antibiotics (Ciprofloxacin) and Cetrizine for 10 days. We are into the 9th day but I see no progress whatsoever. His limp has remained the same/worsened, and I'm not able to take the pain he's going through. Please help if your dog too has had/having the same problem.