Guard dogs for provisioners

[Wunderbot]

Saw something similar to this on Bethesda's mod site, but had a small extra request. Is anyone able to replace the brahmin that accompany Provisioners with the junkyard dogs named Guard Dog or something like that, but in a way that it doesn't replace the brahmin that come with the travelling merchants? It'd make my provisioners a lot less annoying with all their brahmin stuck in my buildings, but I don't want to lose the caravan feeling of merchants.