Why is my clown loach not eating ?

So i bough 1 clown loach along with other schooling fish like neon tetras and the tetras and guppies eat but i have not seen the loach eat 1 time out of the 4 days ive had him, I tested the water and everything was fine all he does is hide in a cave ive only seen him come out 2 times then right back into the cave,... show more So i bough 1 clown loach along with other schooling fish like neon tetras and the tetras and guppies eat but i have not seen the loach eat 1 time out of the 4 days ive had him, I tested the water and everything was fine all he does is hide in a cave ive only seen him come out 2 times then right back into the cave, please help I dont want this buddy to die
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