I understand you not being specific with your plans and using animals as an example so we don't know your exact intentions.
Stock photos is usually associated with images that can be bought and used for something else like in a magazine or for advertisement. If that's your intention, using " stock " in the name gives a clear idea as to your intention.
If you are selling prints suitable for framing and not to be used for commercial purpose, using " stock " would be misleading and confusing.
You said you were just selling pictures that you didn't create so I would be less inclined to use " photography " as this relates more to the overall process of creating the image than just possessing a picture.
I think shorter is better so I think animalphotos or animalpics would be better than animalphotographs or you could even use animalimages.
Thats just my
