It happened a couple of days ago, I was cleaning my pet dog - Dave after we went for a ride when I noticed a strange bump on his left leg. He has been hurt before but it’s not the kind of bump or injury caused by some accident. Dave has been in our family for years, my dad got him when I was a little girl and I love him dearly. Although he doesn’t seem to be in pain I still want to understand if the bump is some kind of skin allergy, dogs are prone to skin anomalies, nothing to worry about - that’s what my vet said when I asked him over a call. What should I do? I am really worried about him.