No, this is not recommended.
Iceberg lettuce isn't toxic, but the high water content makes it useless as a source of nutrition, and is best avoided.
Guinea pigs and rabbits should have a variety of at least 5 different types of leafy greens to protect against nutritional excesses and deficiencies. At least 80% of the diet should be a good quality grass or cereal hay.
✔ Validated by Dr. Nicole Su
Dr. Nicole is Upilio's in-house veterinarian and bunny parent. With her oldest rabbit Ella now 10 years of age, she developed a passion for small herbivore nutrition and credits Ella's health to a good diet, as well as plenty of love.