Guinea Pig Waste?

My nephew has two Guinea Pigs and I noticed they poop a lot. I got to wondering if I can use their droppings for compost and fertilizer? (Kinda like how you would use rabbit droppings.)

Also, if the Guinea Pig poop is okay for compost/fertilizer, can use also compost their soiled bedding (paper pulp pieces, urine and poop)?… or is this not advisable?

Also posted in the compost_wackos community.