soft guinea poop and the hiccups

I'm not sure about the poops, but can you describe the "hiccups"? I'm not sure guinea pigs get hiccups, you might need to take your pig to the vet.

It was like he was vibrating then it stopped but he started running and it went away so I think he is ok. The poop is just sort of wet not his normal poop thought water could be a problem or lettuce.

Stop feeding veggies until his poop goes back to normal, just let him eat his hay. Then slowly introduce them again & watch the amount, try to keep it around a cup in total spread out in in 2-3 feedings. Occasional hiccups are fine, nothing you can do about it.

What veggies do you feed on a daily basis?

Softer poop - that squishes down if they step in it - is typically not a problem. It should still be well formed or shaped. If it seems like the poop is too soft, or is ever runny, then definitely be more aggressive in diet change, as @HannibalLecter suggested & described.

If the poop is just a typical cycle of softer in the morning, harder later in the day, I probably would not worry much at all. You could perhaps look at what time you are giving veggies (is it all at night and therefore lots of water?) and spread that out a bit into a few different times. Or perhaps he's getting pellets at night and that is causing him to drink a lot of water with it. Either way, a more consistent diet throughout the day should give him more consistent poop.

Hiccups are nothing to worry about. They will pass. Don't give water as your piggie could choke or pull some into the lungs. I have one piggie (and it's only the one) that seems to get hiccups on a pretty regular basis. She looks a bit shocked when it's happening, then goes back to running around when it's over. No harm done

I wouldn't stop veggies until it is loose poo. What it sounds like to me is fresh poo- not soft. Fresh poo has a shiny, wet look while older poo is hard...

It's just too soft you know but I thought it was fresh poop as well I really give him lettuce and carrots in his diet. He won't eat some ogre stuff for some reason oh and celery he will eat. It wasnt like this when i first got him that is why I am asking.