Didn't NCR have a scientist who could make cyber-dogs? Is that canon?
Could officers get cyber-horses?
...Naw, not on the NCR's budget. :/
I bet the NCR would have the experts and the know-how to make things like that but not the public funds or the stable infrastructures to mass-produce them.
Big Mountain made cyber-dogs, but their all hostile and I highly doubt anyone would go there to get them.