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Yeah! Most fish can safely go 7 days without food and still be perfectly fine. Over feeding can be really bad for your tank and fish so it's better just to leave it (family and friends have a terrible habit of over feeding)
A few days is no problem.
What may become a problem is a clown trigger and dogface puffer in with a clown.
What type of clown is it?
A maroon clown or large tomato clown may be able to hold their own, but most others will eventually become food.
Oohhh, I strongly recommend setting up other arrangements, assuming they are in the same tank.
percs will definitely end up food or just plain terrorized to death as the size differences between them and the trigger get more pronounced.