Collagen is the most abundant protein in your dog’s body. It’s the structural glue that holds joints, bones, muscles, skin, and the gut lining together. But as dogs age, natural collagen production declines, which can lead to stiff joints, weaker bones, and digestive discomfort.
Four Leaf Rover’s Collagen for dogs is made from just one ingredient: 100% grass-fed, pasture-raised New Zealand beef collagen. Rich in Type I and Type II collagen, it delivers highly absorbable peptides and amino acids that support key systems in your dog’s body:
Joint & Cartilage Support: helps promote healthy cartilage, smooth joint movement and overall mobility
Bone Support: helps contribute to bone density and stability by supporting the bone matrix
Gut Health: helps support gut lining integrity 
100% Collagen
Not all collagen is created equal, and the best collagen for dogs is often sourced from beef. Bovine collagen is a more complete and beneficial solution for joint, bone, and connective tissue health.
Four Leaf Rover offer 100% bovine collagen from pasture-raised, grass-fed cattle raised without hormones, pesticides, or mRNA vaccines. No fillers, no fluff.
Bovine Cartilage Extract: 
rich in Type II collagen and naturally occurring chondroitin sulfate to support joints and connective tissue
Cartilage-Derived Growth Factors (CDGFs): natural compounds that promote tissue repair and strengthen joint resilience over time
Type II Collagen Peptides: highly absorbable peptides that reinforce joint structure, flexibility, and post-activity recovery
Low Molecular Weight Chondroitin Sulfate: designed for optimal absorption and joint lubrication