Doctor Cat/Доктор Кот

From this

by Dalia

To this

by BrokenTeapot

Resulting in this

by Klausmasterflex

Okay, I can't seriously claim the third image was influenced by any of the other two, but that's the order I saw them in as they popped up on Deviant Art. 
Am I a fan of the "Doctor Cat" comics? Not really. I can't say I dislike it, but to me this kind of comedy comes across as "too easy". I tend to enjoy more elaborate humour. But I wouldn't try to stop anyone from checking them out!