I have noticed for a few days now that one of my zebra danios is very thin and not eating. I tried to get him to eat a time or two, but no luck. At every feeding, he seems to want to eat, but it seems almost like he's picky of how big the flakes are. His mouth looks okay, he looks like he'll hyper extend it a few times every few minutes. His breathing doesn't look hard, but every time he does the behavior above it seems to get harder just for a few seconds. The lfs said it could be internal parasites, and that if I'd already tried to feed him food for internal parasites, that there wasn't much else I could do. I wanted to get a second opinion here before I did anything. What else could I do for this little guy?
