Both the chicken and the egg.

Might be the seals to some high level jutsu.

What is this from?

I would say it’s pronounced closer to Cedar in this context (mandarin speaker)

Fair enough. How about this:

"Domesticated and wild mammals are sometimes coprophagic, and in some species, this forms an essential part of their method of digesting tough plant material.

Some dogs may lack critical digestive enzymes when they are only eating processed dried foods, so they gain these from consuming fecal matter. They only consume fecal matter that is less than two days old which supports this theory."

No need to make personal attacks. Cecotrophy is a common phenomenon in certain animals. I don’t know specifically about foxes but it wouldn’t be a stretch if it was common behavior for them. Do you have any sources that suggest otherwise?