Safe & Natural BioActive Triple Helical Collagen. Kollavet® Collagen Sheets are the next generation of medical-grade higher nativity collagen for healing minor or major animal wounds. Our collagen products are designed to help animal wounds heal quickly and naturally. Kollavet® Collagen Sheet Dressings are easy to apply, safe, natural, and effective. Appropriate for small to large draining wounds. Kollavet products are safe and effective for surgical sites, traumatic wounds, superficial wounds, burns, footpad injuries, hot spots, and lick granulomas.