Charlie's latest conquest? He's come full circle, fostering yet another Chihuahua.
"He's still skittish around me, but he loves Charlie," Bupp says of the new arrival.
Indeed, Charlie has already made great strides with the Chihuahua, without even taking a step. Charlie, you see, sleeps in bed with the Bupps.
When the other dog saw that, he decided it was safe to scamper into the bed along with them.
"Once Charlie gets in bed, he comes and gets in bed with us too," Bupp explains. "I know he wouldn't do that if Charlie wasn't doing that."
See? Charlie seems to say. Humans are all right.