Table 1:

Dogs included in the pair-housing study

Dog IDDog nameSexReproductive statusAge (years)*Length of stay (months) at first hair collection
Paired 1A NikeMaleNeutered1.812
Paired 1B SellyFemaleSpayed210
Paired 2A ThunderFemaleSpayed29
Paired 2B SnowFemaleSpayed213
Paired 3A GeorgiaFemaleSpayed214
Paired 3B CloveFemaleSpayed416
Paired 4A KatoMaleIntact1.88
Paired 4B TuckerMaleNeutered210
Solitary 1 MysticMaleIntact29
Solitary 2 LucyFemaleIntact317
Solitary 3 LillyFemaleIntact48
Solitary 4 BumperMaleNeutered220
  • All dogs were housed in solitary kennels during the baseline study period; experimental dogs were pair-housed and control dogs remained solitary during the treatment period. Pairs are identified according to the dog they were paired with, once moved into pair housing (eg, dogs ‘Pair1A’ and ‘Pair1B’ were housed together after the change).

  • *Exact age is rarely known for colony dogs (except for dogs ‘Paired 1A’ and ‘Paired 4A’, who were born onsite); age is estimated by the veterinary staff when the dog is first added to the colony.

  • †This dog was being treated for anxiety with the tricyclic antidepressant amitriptyline (50 mg orally, twice daily) before the study commenced and for the duration of the study.