Pictures really help. Or concise discriptions of the damage or bugs found.

Are they indoors or outside? If outside, a location would help as well. There's lots of folks on here with great advice, just need all the pieces of the puzzle to help them give you the most appropriate advice.

they are outside.

I would guess slugs or snails to be a possibility... if they are potted, you could try moving them to a location off the ground... and if they are in your garden, you might look into a systemic insecticide or snail bait.