“We have always had German Shepherds and our LOKI looks exactly like Rex... Diesel will be missed.” Facebook · I Love Dogs · 1 year ago

Both dogs belong to the same Triezenbachtal line of German Shepherds from Germany.

Fans of the series may notice changes in more recent seasons due to the following events:

“TIL: There is a current Canadian series Hudson & Rex... and the dog is a descendant of the original Rex.” Reddit · r/Austria · 1 year ago

Diesel vom Burgimwald played Rex for seasons 1 through 6. Following his unexpected death from cancer in August 2024, his nephews Dillon and Dante took over the leading role starting in Season 7, Episode 3.