Let's say I didn't want to use the ImageNet or CaffeNet pre-trained models but wanted to train my own model (say, of thousands of images of sofas, leopards, jaguars, and cheetahs); are there any tutorials that walk through the process of building a CNN on your own data?

(I've seen the comments like https://news.ycombinator.com/item?id=9584325 and watched the lectures and youtube walkthroughs, but they're all theoretical and I'm looking for documented code to go along with that theory)