A diet of hypoallergenic food in this case is beneficial. If he is vomiting occasionally, he may be eating too quickly or need to switch up his protein. If he has not been to the vet yet, we would recommend taking him in to ensure there are no underlying issues.
Multi Essentials: A plant-based multi-vitamin herbal extract that helps fill nutritional voids, aids digestion, and enhances nutrient absorption. They would be beneficial in maximizing nutrition.
Yucca is a highly nutritive herb and can aid in proper digestion. The compounds in Yucca help with the infiltration and absorption of minerals and vitamins.