Please do not post if a detail has already been pointed out; it's just SPAM and off-topic. I know it's annoying when the same detail gets repeated over and over, but when every other post is just "already been said" or "pointed out", it's just unnecessary.
Such posts will be deemed as SPAM, and reported.
If you see anything 'wrong' with the coloring, lineart or whatever it is you have spotted, this is NOT the place to be posting. It is taken as criticizing the artists' work, which is unacceptable. If you wish to discuss it, the artist would be the best person to PM.
Sometimes, there might be a detail on a pet you look past. But sometimes these can be rather interesting.
For example..
This pet looks like she has an upside down smiley face on the tail furthest away from you.
And this has some of the same markings.