Four Leaf Rover is a trusted name in the natural pet supplement world. Known for its clean formulations and transparent sourcing, this brand offers grass-fed bovine colostrum designed specifically for dogs.
What sets them apart is their focus on quality, third-party testing, and functional health, making them a go-to for pet owners seeking safe and effective immune and gut support.
Let’s break down how their colostrum ranks based on real user feedback and our expert criteria.
👉 Buy Four Leaf Rover Colostrum Here
Four Leaf Rover was founded by Dana Scott, a pet wellness advocate and the founder of Dogs Naturally Magazine. The brand prides itself on being science-backed, dog-first, and ultra-pure — meaning no synthetic additives or harsh fillers.
Their mission? “To provide effective, clean supplements for dogs made from whole foods with full transparency.” Their colostrum is sourced from 100% grass-fed cows in the U.S., collected ethically in the first 12 hours after calving — a crucial time window for nutrient density.
When it comes to pet supplements, quality and safety are non-negotiable. Four Leaf Rover’s colostrum checks all the right boxes:
While not liposomal, the powder is minimally processed to preserve its bioactive compounds and ensure high potency for immune and gut benefits.
Unlike many pet supplements, Four Leaf Rover Bovine Colostrum uses a gentle, low-heat drying process that helps maintain the integrity of immunoglobulins, growth factors, and peptides.
This attention to detail helps maximize the supplement’s gut-healing and immune-boosting effects, especially for dogs with allergies, sensitivities, or chronic digestive issues.
Four Leaf Rover doesn’t publicly list IgG percentages, but based on reviews and third-party data, it likely sits within the 20–30% IgG range, typical of high-quality colostrum.
What users are noticing:
Many owners report improvements within 7–14 days — especially when switching from kibble-based supplements to Four Leaf Rover’s natural formulation.
Transparency is one of the brand’s key strengths. Four Leaf Rover bovine colostrum shares detailed info about:
While IgG levels aren’t published, the third-party testing ensures safety, purity, and consistency — a must for pet parents seeking peace of mind.
This formula is as clean as it gets:
This makes it ideal for dogs with sensitive stomachs, food allergies, or autoimmune conditions.
The product comes in a fine powder that easily mixes into food or water. Dosage is based on dog weight (¼ to 1 scoop/day), and most dogs take to the taste without issue.
Tip: For dogs with histamine intolerance or extreme allergies, start slow and build up over a week.
Four Leaf Rover sources colostrum in a way that supports calf health and mother wellness. Only surplus colostrum (after the calf’s needs are met) is harvested — a critical factor for ethical buyers.
Here’s what users are saying across platforms:
On Amazon:
On their Website:
On Reddit (r/dogs, r/naturaldog):
While not the cheapest, its clean formulation and quality sourcing justify the cost — especially if you’re looking for results over gimmicks.
Pros:
✅ Grass-fed, ethically sourced
✅ Clean, filler-free formulation
✅ Excellent reviews from pet owners
✅ Manufactured in the USA
Cons:
❌ IgG percentage not listed
❌ No human formula available
💲 Price: $$ | ⭐ Rating: 4.5/5 | 📦 Subscribe & Save Available
👉 Buy Four Leaf Rover Colostrum Here
👉 Compare with Other Colostrum Brands →