Yes, exactly,
a) sewn animals: stuffed animals, toys, such as Ruth’s great collection in the post above
and
b) sewing patterns for animals: as Veronika wrote, everything for use with pets, e.g. dog coats, dog collars, treat bags, poop bag pouches, pet beds, etc.
as in the category
https://www.crazypatterns.net/de/naehanleitungen-haustiere
For b), and in the case of clothing, taking the correct measurements, choosing the right size, and getting the fit right are of course very important. Also, the dog should feel comfortable in it and not have its movement restricted.