Jack has gone to Day Care now a total of four times (within 3 weeks). Each time I pick him up, he has blisters on his paw pads & in between each individual toe. I know that eventually he should build up calluses on his pads, but how do I keep him from getting blisters/raw spots in between his toes? I purchased some Paw Wax at Petsmart & put it on him this morning before Day Care. The bottom of the pad looked better, but the raw places on the toes look as bad or worse? Any suggestions?