Our dogs try their best to communicate with us, we need to listen.
Today I was grooming young Java. He has been wonderful about standing on the grooming table while I dremel/grind his nails. Today he pulled his right front foot away as I went to hold onto his paw. I thought that odd. I tried again, thinking maybe I had tickled the bottom of his pads with my finger. Same response.
Instead of insisting he hold still, I checked his bottom pads and looked between his toes. Everything looked fine. But Java was telling me something was not right. I continued my search for what could be wrong. And I found what was causing some discomfort. Java's carpal pad was torn. This is the pad that is just above the dew claw. http://en.wikipedia.org/wiki/Paw
At first glance the carpal pad was not even visible.
But after I moved the hair away, I saw the torn area.
As always, my relationship with my dogs is priority. I cleaned out the sore area and will trim the nails on his right foot on another day. Listen to your dog, although not always immediately understood by us humans, they are usually trying to tell us something.