I have had this one spot fox face for about 4 days now. Its stomach looks puffed out, but he has been eating PE mysis like a hog (I have him and 2x cardinals in an observation tank, and he eats some of their share too). I also have a veggie clip in there for him, which he has been picking at. Is his stomach swollen because he's eating this much, or do you think he has a problem?