We actually bought our treadmill with the longest available tread area so our large dogs could use it. Our 100 lb Golden uses it all the time. The cats will watch him, but aren't interested.
The black cat sure is interested on working on the upper body!
Skin kids - Jason, Kevin, Allison
Canine kids - Bennett & Bailey (always in our hearts), Riley, Banker, Rogue and Boz
Feline kids - Zoey, Talley and Abra