Dog owner found these Strange things, You will be surprised watching this

In this video I found these strange looking black dots on my Dog’s elbow.
So, I did some research and took my pet to the vet too.
The vet said there is nothing to be worried about.
So I bring him back and recorded this video of removing the Blackheads from his elbow.
Yes! It is formed on the same surface which touches the floor most of the time. It may have caused because of the friction or press which didn’t let the hairs to grow and they form these blackheads.
These blackheads appeared to me last year too. I removed it before also so I know that there are no side effects of removing these. Because when I removed it the last year, the hairs started to grow on the surface but when summer came my dog started to sleeping on the floor because the floor is always the coldest part.

Inner Light by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300021
Artist: http://incompetech.com/