Fermex Field Study Update: First Bresse Offspring Weights

October 14, 2026 · Bryant’s Roost Supplement Field Study

We have a new starting point in our Fermex field study: the first individual weights from Bresse chicks produced by our breeding pens.

Today, we weighed and banded 30 chicks from four pens. The six chicks from Pen 5—the pen whose parent birds received Fermex in their feed beginning at hatch—had the highest average body weight at this first measurement.

That is an observation worth following, not proof that Fermex caused the difference.

Today’s Bresse chick weights

The chicks are approximately one week old. These measurements establish a baseline for following each bird over time.

October 14, 2026 · First individual weigh-in

Breeding pen	Chicks	Mean weight
Pen 2	5	90.6 g
Pen 3	9	96.1 g
Pen 4	10	98.6 g
Pen 5 Fermex-fed parents	6	108.2 g

The 24 chicks from Pens 2, 3, and 4 averaged 96.0 grams combined. The six Pen 5 chicks averaged 108.2 grams—about 12.2 grams, or 12.7%, heavier at this first weighing. The combined comparison is calculated from all 24 individual weights, not a simple average of the three pen averages.

Heavier today does not yet mean faster growth

One weighing tells us what each chick weighs now. It does not tell us how quickly that chick gained weight. We need repeat measurements before we can compare growth rates.

Each chick now has an individual wing-band number, so future weigh-ins can follow the same birds rather than relying only on group averages.

What this comparison can—and cannot—tell us

This is an observational farm field study. Genetics, egg size, sex ratios, breeder performance, and other differences between pens may contribute to the weights we see.

There is only one Fermex-parent pen in this comparison. Its six chicks are six individual observations, not six independent treatment groups. That limits what we can conclude about the supplement.

We also need to keep parent supplementation separate from chick supplementation. The Pen 5 parents received Fermex as they grew and matured. Direct Fermex exposure of these offspring has not been established, so we are not presenting this as a trial of chicks being directly fed Fermex.

These weights do not establish a benefit in hatch rate, survival, or feed efficiency, and we are not attributing the weight difference to Fermex.

What we’ll follow next

Our next measurements will let us look at individual weight gain, how evenly the chicks grow, survival, and physical development. The important question is whether this early difference persists as the birds mature.

For now, we have a documented baseline and individually identified birds. We’ll keep reporting what we observe, including results that do not support a benefit. Promising observations are a reason to keep measuring—not a substitute for evidence.

Read the previous Fermex field study update or follow the full supplement field study.

Week 1 Observations

This study began after a manufacturer reached out and offered a gut health supplement for evaluation. The product was provided at no cost, with no input on trial design, data collection, or reporting. Given the opportunity to test it under real breeder conditions, I chose to run a structured field study focused on measurable outcomes.

The supplement used in this trial is a fermented, seaweed-based product processed using lactic acid bacteria. It is intended to support gut health, with the goal of improving overall bird condition, nutrient utilization, and resilience under typical production stressors.

In this study, I’m not evaluating claims directly, but observing whether measurable changes occur in growth consistency, vitality, feather quality, mortality, and long-term reproductive performance, including fertility and hatchability.

Short clip of chicks consuming the supplement during the first week.

Trial Setup

The supplement was delivered in a quantity sufficient to support approximately five months of use.

A breeder cage from Wynola Ranch was provided to conduct the adult portion of the trial.

On Wednesday, the first batch of quail hatched. Twenty chicks were placed in a brooder and provided clean water, the test supplement, and Show Pro Quail Starter feed. The brooder was set up with a brooder plate, dry stall pellets, and maintained in a draft-free environment.

As of this point, no mortalities have been observed. The chicks consumed the initial 3.9 g of supplement within the first 24 hours, indicating immediate acceptance.

On Saturday, April 4, a group of 7-week-old Coturnix quail—13 hens and 3 males—were moved into the Wynola Ranch breeder cage. Each bird was evaluated for physical defects, and none were identified. The group was weighed and found to be uniform in size.

These birds are being maintained on Show Pro layer/breeder feed and were provided 15.2 g of supplement upon introduction. One bird began consuming the supplement immediately, with others following shortly after.

Additional breeder groups have been sorted and will be incorporated into the trial as it progresses.

Early Observations

From a breeder standpoint, the first thing I notice with any new supplement is whether birds accept it without hesitation. In this case, both chicks and adults showed immediate interest. There was no delay in consumption, which is often the first barrier with any new input.

The supplement itself has a mild, pleasant odor and a crumble consistency that works well across age groups. The particle size is appropriate for both chicks and adult birds, which makes it easy to offer without modification.

At five days old, the chicks appear uniform in size and remain active. There are no early signs of lagging individuals, which is one of the first indicators I watch for when evaluating overall development.

The Bresse group presents a different challenge. Because they are maintained outdoors, accurately measuring supplement intake is more difficult due to environmental factors such as rodents and general feed loss. For now, I’ve incorporated the supplement into their daily feed ration while I work toward a more controlled method of tracking consumption.

At this stage, the most important indicators are acceptance, activity, and uniformity. All three are present so far, which provides a solid baseline moving into the next phase of observation.

What I’m Watching Next

Moving into next week, I’ll be adding a control group of 20 chicks from this week’s hatch to establish a direct comparison against the supplemented group.

I’ll also be finishing setup of the breeder groups and continuing to track supplement intake as consistently as possible.

Another area I’ll be paying closer attention to is manure condition on the poop trays compared to non-supplemented groups, as this can provide an early indicator of digestive response.