Feel Good 20 supplements are split into 8 'solution' categories. Do not feed supplements within the same category together. You may feed across the categories, i.e. you may feed any single supplement from each category together. The exception to this rule is the 'General Health' category - supplements in this category can be fed freely together across all categories. If in any doubt regarding the compatibility of these feed supplements with any other specialist feed or supplementation call our FREEPHONE helpline for advice: 0800 867283