The reason I asked is that foxhounds normally don't make good pets, so very few people would have one. However, it's common for hunts to ask people to look after their puppies until they are fully grown.
Did you get you map from the TalkToaster web site? My GB maps from there work fine. I don't use Base Camp. All I did was to put the image into the GARMIN folder on the micro SD. I can't remember if the naming is significant, but I called mine GMAPSUPP.IMG.
If I go into Setup/Map/Select Map I can see a list of maps I have installed. I can select the map. Then I have to go into Advanced Maps Setup and set Detail to Most.