Canadian Brand. Crumps' Naturals Sweet Potato Chews are packed with vitamins and minerals (Vitamin A, B6, Potassium, Phosphorus, Iron, Thiamin, Riboflavin, Niacin & Calcium) and fibre. This human grade, wholesome treat is high in fibre which has been proven to dramatically improve digestive health. Crumps' Naturals Sweet Potato Chews are hypoallergenic - great for dogs with wheat or corn allergies. This highly digestible energy source is also an excellent source of beta-carotene. Crumps' Naturals uses fresh Ontario grown Sweet Potatoes straight from the farmer's field.