I'm not sure if you guys have seen this one before. While i'm online with other players I was encounter with this huge cow. I got 5 Gold milk in a row from this cow. the question is how can I breed one? Sorry for my bad gamma.
That's the random super-giant animal that can appear when using the wifi system. You can't breed them. If you see a super-giant then you will get 5 super-quality items that the animal produces (5 HQ milk from cows, 5 HQ llama wool from llamas, etc.)
There are also large animals that you can come accross. Large size animals will simply be a bit bigger than the normal sized ones - it is noticeable, but not insanely larger like the super-sized ones. Large animals you can raise on your farm by giving the animal enough treats so that it can produce 5 items, it has a friendship level of 9 or 10 hearts, and you've owned the animal for at least 1000 hours.