Thanks everyone for the replies... I agree that humidity doesn't help and the hot spots were worse a couple of months ago when we were having our rainy season. They are pretty much gone now that we are in the dry season but the paw irritation remains.
I have him on Taste of the Wild food because it is lower in yeast than other dog foods but didn't think about the bovine colostrum being dairy. I was using that because it is said to be helpful with skin problems so I wanted to try it when he was having the hot spots. The yogurt (2 tsp per day) is suppose to be a "good" yeast and help with infections so that is why I was putting the probiotic in with the yogurt.
I would like to try the Lavender Essential oil... do you now what the ratio is for mixing with water?