What is the answer to Can guinea pigs eat grapes? The answer is yes, mostly.* Grapes provide your cavy with both vitamin A and vitamin C. Guinea pigs do not naturally produce their own vitamin C and therefore need to be fed fruits that contain vitamin C, such as grapes. This will reduce the risk of your guinea pig getting scurvy, which results from a lack of vitamin C.
The grapes can be either red or green and should be seedless. You can feed your guinea pig up to two grapes at a time. Some pet owners suggest cutting them to make it easier for your cavy to eat them. Be sure to wash the grapes before you give them to your cavy and be sure that they were not treated with any chemicals prior to consumption by your guinea pig.
Although guinea pigs eat grapes, they should only be eaten one or two times a week. They are high in both sugar and acid so they can cause stomach upset and weight gain in the short run and diabetes in the long run, if fed too frequently. Also, you should not feed your cavy grapes along with other foods high in sugar.
Remember that while it is generally safe to let guinea pigs eat grapes, your cavy may not enjoy the flavor. Be sure to pay constant attention to the preferences your guinea pig has to certain fruits and to their digestive reactions to certain fruits. This way, you can provide them with a diet that will keep them both healthy and happy.
*Please note that while there is a general consensus that guinea pigs can eat grapes, there is a possibility that they may cause kidney failure. Grapes are known to cause kidney failure in dogs, but it is still unclear if they have the same result in guinea pigs. However, the possibility that grapes can negatively affect a guinea pig’s kidneys has been suggested by some veterinarians.