First Try. Question by Lexa- Mackie-: Tomatoes can kill guinea pigs? I just read somewhere on here that tomatoes can kill guinea pigs? I know they can cause mouth sores because of the acidity but I never heard that tomatoes can kill guinea pigs. I give my piggies tomatoes once a week as a treat because they love them. They have been eating tomatoes for almost four years. Should I stop feeding them tomatoes? Best answer: Answer by AmyTomatoes are one of my guineas favorite things, I’ve fed them cherry tomatoes a lot. They’re not… Read Article →