Breeding Colony Management: A Complete Guide for Research Labs
Summary
Breeding is the most operationally complex workflow in any vivarium. A breeding program that is not tracked carefully produces genotyping backlogs, inbreeding accidents, and weaning delays that cascade into overcrowding. This guide covers how modern colony management software handles breeding, from setting up a pair to visualizing the fifth-generation pedigree, and what to look for when choosing a platform.
The Breeding Workflow, Step by Step
1. Setting Up a Pair or Trio
Record the male and female IDs, the setup date, and the breeding purpose (strain maintenance, expansion, experimental cohort). Colony.care automatically creates a breeding record and starts the gestation clock. If you are using timed mating, record the plug check date, the system calculates the expected litter date from that point.
2. Tracking Gestation
The platform tracks expected litter dates based on species-specific gestation periods, ~19 days for mice, ~21 for rats, ~31 for rabbits, ~68 for guinea pigs. The breeding calendar shows all active pairs, their stage, and what is due when. No more counting days on a paper calendar.
3. Recording a Litter
When a litter arrives, record the birth date, litter size, and any notes (stillbirths, runts, fostering). The system compares actual litter size against the strain average and flags unusual outcomes. Pups are created as individual records linked to the litter, genotypes can be assigned immediately or after genotyping results come back.
4. Weaning
Colony.care schedules weaning automatically based on species-specific weaning age. The breeding calendar shows which litters are due for weaning this week. At weaning, pups are separated by sex into new cages, and the dam returns to the breeding pool or is retired per your protocol.
5. Pedigree and Next Cross
Every breeding event builds the pedigree tree. The visualization shows multi-generation lineage with genotype overlay. Before setting up the next cross, the consanguinity check flags any pair that shares more ancestry than your protocol allows.
FAQ
Can Colony.care handle timed mating and plug checks?
Yes. Record the plug check date and the system calculates the expected litter date. The breeding calendar shows all timed mating pairs with their stage and due dates.
Does the pedigree visualization support complex breeding schemes?
Yes. The interactive pedigree handles multi-generation crosses, backcrosses to congenics, and complex transgenic breeding schemes. Genotype information overlays on the tree so you can trace allele inheritance across generations.