Sweet potato leaves are the natural leaves of sweet potatoes.
We’ve already looked at sweet potatoes, but what of their leaves. Can guinea pigs eat them?
Read More http://nutritiondata.self.com/facts/vegetables-and-vegetable-products/2664/2#ixzz2spSnosRQ
As you can see they do contain little phosphorus, a hint of calcium and fat, and are quite acidic.
With that in mind, guinea pigs can eat sweet potato leaves but only one to two times a week due to their acidic and phosphorus content.