Foot Pad Mis-shapes

[Loraine]

My Wire Haired Fox Terrier (ex showie/stud) is 4 years old. We walk on pavements and grass. When he came to me 2 years ago I notice that on both front paws he had a pad that had grown a forward facing sharpish point, rather like hard skin. My vet had no idea what caused this, and she just clipped the points off. No blood, no pain for the dog.

I now notice that on both front feet he is growing these points again, but this time they are rear-facing. I have never come across this before. He has been on homeopathic treatment for skin problems, and at one time I noticed that has pads seemed to be very soft (almost squishy feeling). He has stopped the meds due to a tummy bug, and his pads are normal, hard-skin type pads, now with these points growing.

Any ideas people????