Fischer 344

Fischer 344


The colony history began at Columbia University Institute for Cancer research under the direction of Curtis in 1920. From there the rats were raised at Heston in 1949. Next, they were bred at NIH in 1950. Taconic received and bred them beginning in 1984. Hilltop first received and began breeding the colony beginning in 1995. All colony histories contain some possibility of inaccuracy. This information is provided to the best of Hilltop's knowledge.
Growth Chart
Blood Chemistries
Viral Antibody Profile
Services Offered
  • Retired Breeders
  • Timed Pregant
  • Untimed Pregnant
  • Littermates
  • Mothers with Litters


The coat color of the rat is albino. The rat colony is an inbred colony. Animals are propageted by brother x sister mating. The colony at Hilltop Lab Animals, Inc. is a closed colony and has been so since 1995. Closed colonies develop qualities causing the rats to be uniquely suited to certain types of research.