I've noticed today that the "heel" of my chocolate lab's left front leg has some part of it not in its right dark color, with the fur around it looking a bit wet and sticky due to some discharge.
It's not really a part a dog steps on, so I'm not sure if he's likely to have hurt it somehow during a walk. I'm not sure it's swollen much, but anyway it seems to be on the pad itself so it's probably not part of the lighter skin that was pushed into visibility due to inflammation of sorts.
My dog is almost 6 years old and I want to make sure this isn't somehow a tumor of sorts. Thanks in advance.