Please, in the future don't share a group of photos by different artists like that, and if possible make sure each post links to the photographer's site. You can still edit it in now.
When photos are posted as single posts, it's possible to make them clickable, so that they link back to the artist's site. Which is the right thing to do, especially on tumblr. Folks on tumblr usually delete the text credits; often the most popular posts don't even write who the artist is, so at least the image will be linked.
Please consider it for your future posts, for the benefit of the artists.
Beautiful job; I love the flow of the picture that sort of leads the viewer's eyes- the blurs along the side of the picture really are a great effect! Nice focus on the cat's eyes too. :3 Great job! ^=^