last thing you want to be feeding an oscar is beef heart. or gold fish for that mater. quality pellet, you want a long living fish, not a large dead one.
He's also in a 35 gallon. I bet the Oscar just has really poor genes though. Look at his face after all.Woah he's so malnutritioned if he's grown only that big. I understand only flake but try to get him on beef heart, brine shrimp, or krill.
I understand his deformity but flakes are probably the only thing that can fit do he eats it. What I described above should be his staple
He's also in a 35 gallon. I bet the Oscar just has really poor genes though. Look at his face after all.
Yeah because they're massively sold and cost is cheap.If we had an Oscar with a small lip deformity at the lfs I worked at I wouldn't put him down.

Btw you know this is a 4 year old post right? Most of these ppl probably aren't even members of this site anymore. Not trying to be mean here but just figured I'd let ya know.I wanted to chime in here. My lutino oscar has this same mouth deformity that began when he was 3 inches. The same exact side of the mouth too. It wasn't like this when I first bought him and seemed to happen overnight. Mine doesn't have any problem eating tho. I think its just genetics. At first I thought maybe its an injury from lip locking or he injured himself on the substrate. Whatever it is, I see your oscar has the same issue and albinos and lutinos have genetic problems it seems like. I guess now I know that it won't go away so I guess I'll just have to get used to it.