Border collie earrings. Filament switch from black to white. You can probably (kinda) make it other breeds by switching colors (black and brown, gold and white etc.)
I printed them with 0.3 mm nozzle with 0.2 mm layer height and they printed perfectly. I'm not sure how it would go on 0.4 mm nozzle, you might have to make them a bit larger.
The author marked this model as their own original creation.