"Once Ben realized that he could feed Artie his food - an enormous treat, our dogs never got people food before Ben - their friendship was set in stone," Sadie says.
But Artie's enthusiasm for people food never trumped his gentleness toward Ben.
"Artie is so careful with Ben's little fingers," Sadie explains. "Not to mention, they both know they're not supposed to be sharing food, so it's like a stealth mission for them."
One thing that Ben and Artie don't hide is their love for each other. They wear it on their sleeves.