What will happen if you fed your guinea pig iceberg lettuce?

Iceberg Lettuce is not Guinea Pig food and is not a healthy part of their diet. Guinea pigs may eat little pieces of iceberg lettuce as a treat, but will get no nutrition from it other than a little water. Guinea pigs that are given large amounts of iceberg lettuce will fill up on this food which has no nutrition, and it then prevents them from eating as much of their good foods. Eating a diet with lots of iceberg lettuce can cause them to be malnourished, get sick and die if only given iceberg lettuce (sad but true, this lettuce is inexpensive so people may be tempted to give it daily like food- causing their guinea pigs to die of starvation). Guinea pigs need lots of timothy hay and vitamin C rich pellets as the staple of their diet. Things like carrots, Oranges, blueberries, green leafy vegetables are great snacks that give them lots of vitamins. Iceberg gives no vitamins, no calories, but makes them feel full- so iceberg lettuce should only be given as a treat in small amounts and try to give them green lettuces instead- the darker the lettuce (spinach) the more nutritional value. Guinea pigs are not allergic to iceberg and will not have an adverse reaction to iceberg- it is safe to give in very small amounts.