Thomas, I am also unaware of any Microgale colonies maintained in captivity outside Madagascar.

From my experience in Madagascar, the larger Microgale species (e.g. M. talazaci and M. dobsoni) are relatively easy to keep. M. dobsoni is actually quite a docile animal and easy to handle; in contrast, M. talzaci never gets habituated to handling and can be very aggressive. Smaller species of the cowani size range are difficult to maintain; we need to know more about their diet and habitat needs.

For more information see the following paper which David has put up on "Tenrec Publications Online":

STEPHENSON, P.J., RACEY, P.A. & RAKOTONDRAPARANY, F. (1994). Maintenance and reproduction of tenrecs (Tenrecidae) in captivity at Parc Tsimbazaza, Madagascar. International Zoo Yearbook, 33: 194-201.

PJ Stephenson
Co-ordinator, Tenrec Section
IUCN/SSC Afrotheria Specialist Group
http://www.calacademy.org/research/bmammals/afrotheria/ASG.html#