Just as a one of i would give him some chicken or some fish, if he eats that then there is nothing wrong hes just been fussy, you should put is food in his bowl and leave it 20 mins if he dose not eat it take it away then give at tea time if he still dose not eat then he gets nothing till the next morning its hard to do this but he may not eat for a few days but he will when he is hungry and all trainers will tell you this as they carnt mess around in the wild.

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