Onyx not eating..

[Lateralus]

I'm not too worried yet but I noticed one of my onyx hasn't eaten for about 4 days. Dominance between these two varies from week to week but haven't had a problem with either eating. Recently here they have been competing for a large patch of gsp as a host and the one that's not eating lost control of the gsp about 3 days ago. So far I've offered them Rod's original and some cyclopeze. I've never seen fish turn down either of these foods until now. Any suggestions are appreciated.

 

[blackwagon]

Any weird poop? Anything look different about it?

 

[Lateralus]

Ill keep an eye on the poop not sure theres anything to poop since he wont eat. What should I be looking for poopwise?

As far as anything else goes he looks normal.

 

[blackwagon]

If it's stringy/the color. It's probably just sad that it lost (no sarcasm intended). It will probably start eating soon.

 

[Lateralus]

Idk I'm thinking internal parasite.