Not sure about stress mate, more likely being greedy and picking up way too much food to chew and swallow. In an attempt to prevent other fish getting it, holds it in its mouth and slowly works on it. I’d think shrimp in a warm tank would go bad in 3 days though. I’d be a little concerned about that if it were me 
If they’re readily taking high quality carnivore pellets there’s really no need to feed shrimp at this stage. When they get to breeding size you could reintroduce to stimulate spawning behavior
If they’re readily taking high quality carnivore pellets there’s really no need to feed shrimp at this stage. When they get to breeding size you could reintroduce to stimulate spawning behavior
