At 3:30 last night, I was woken to my 5.5mth puppy vomiting. It was a small amount of grass and three small threads of plastic. I’m not sure where the plastic was from, as I couldn’t see a chewed container (similar plastic) anywhere. She normally just chews stuff and spits it out. Seems ok now and happily ate her breakfast. Should I worry. If it happens again, I will contact vet.