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They may not have a bowel movement every single day, but your boy should have a bowel movement at least every other day. If this seems to be a problem, you can start giving him a little canned food every day mixed with a couple of spoonsful of canned pumpkin (not pumpkin pie filling). This helps immensely with cats that are slightly constipated and should help your boy go more regularly.
Please let me know if I can help further.