My Corgi is 9 weeks old today and I had him in my lap and noticed that he has what looks like bruises on his paws. He doesn't seem to be in any pain. We go on walks - about 10 minutes a day on the sidewalk - most of our time is in the house or yard. He is crated during the day, but several of the bruises are on his back paws - and I've never seen him scratch at his crate.
They are mostly round and on one back foot they are evenly spaced across from each other.
Any ideas? Is this just a "toughening" of the pads? Or should I be concerned?