Birth to Death

Born at a purpose-bred facility — Marshall BioResources, Ridglan Farms, or one of a handful of others. The mother may produce up to two litters per year for five to seven years before being retired or euthanized.

• •Litter size averages 5–7 puppies
• •Perinatal mortality: ~12.9% (vs ~8% across breeds)
• •Concrete floor, artificial lighting, standardized diet for the dam
• •No commercial breeder publishes comprehensive mortality data
• •Puppies born with defects are culled — protocols are proprietary

Source: Breeding Protocols; 1957 JAVMA perinatal mortality study

Each puppy receives an ear tattoo — an alphanumeric code inked inside the ear. This is their identity for life. They will never have a name.

• •Tattoo applied via clamp or electric pen, typically without anesthesia
• •Code encodes facility of origin, birth cohort, and individual sequence
• •Dogs passing through multiple facilities may be tattooed in both ears
• •Microchip implanted as supplementary ID (large-bore needle, no anesthesia)
• •Some technicians name dogs informally — never officially recorded

Source: AWA 9 CFR §2.50; identification requirements

Separated from the mother. The critical socialization window (3–12 weeks) — when a dog's lifelong relationship with humans and the world is formed — passes in a kennel environment.

• •Limited human contact beyond routine husbandry
• •No exposure to grass, stairs, sunlight, household sounds
• •Housed with littermates in standard kennel runs
• •Kenneled beagles show markedly lower novelty response than pet-raised dogs
• •This developmental deprivation becomes a permanent behavioral signature

Source: Canine developmental literature; behavioral studies on kennel-raised beagles

Transported to laboratories or CROs via climate-controlled ground vans or air freight. The dog leaves the only environment it has ever known.

• •1–2 hours of road transport increases cortisol and stress markers
• •No habituation across repeated transports — stress does not diminish
• •Sedation with acepromazine does not reduce measured stress
• •6,000+ beagles shipped via SAS through Copenhagen (exposed 2023)
• •Marshall ships internationally to 7+ countries

Source: Transport stress studies; Camp Beagle / Copenhagen investigation 2023

Acclimation period at the receiving facility. The dog is trained to accept the routines that will define the rest of its life.

• •Trained to accept restraint slings and handling by strangers
• •Habituated to gavage tubes, inhalation masks, blood draw positions
• •Baseline health assessments: blood chemistry, physical exam, weight
• •Assigned to a study protocol and dosing group
• •Cage card posted: ID, study number, sponsor, projected termination date

Source: GLP study protocols; facility SOPs

The purpose of the dog's existence. Daily procedures begin and continue until the study endpoint — which, for most dogs, is death.

• •Oral gavage: tube forced down throat into stomach, daily for weeks to months
• •Inhalation: mask or chamber exposure to aerosolized compounds, hours daily
• •Cardiovascular telemetry: transmitter surgically implanted in abdomen
• •Blood draws: jugular or cephalic vein, weekly or more frequent
• •Clinical observations: body weight, food consumption, clinical signs, behavior
• •Some dogs reused across multiple studies (EU: ~39% reuse rate)

Source: OECD TG 409; ICH M3(R2); study design literature

Euthanized by lethal injection, then subjected to a complete necropsy — every organ removed, weighed, examined, and sectioned for microscopic analysis.

• •~95% of research beagles are killed at study end
• •Regulatory data package requires postmortem tissue examination
• •Full organ set: liver, kidneys, heart, lungs, brain, GI tract, reproductive organs
• •Histopathology slides prepared from 40+ tissue sites per animal
• •Euthanasia classified as painless under AVMA guidelines — the life preceding it is not

Source: Standard necropsy protocols; AVMA euthanasia guidelines