Here's Walter enjoying a couple of chocolate chips.
First, chocolate chips are safe for rats. They can even be beneficial for rats with pulmonary issues as chocolate is a bronchodilator.
Second, I must apologize for the obnoxious sound. Our ceiling fan is too noisy.
By the way, this is our new Walter. Our other Walter passed away of his old age complicated by obesity.
This is Walter Bishop of "Fringe" fame. He takes after the original Walter in many ways. He has similar coloring. He's also quite stocky with cute little jowls, but his weight hasn't ballooned like the original Walter's did. He loves his food like original Walter as you can see from the video. But, he also loves to exercise, and he's currently our only rat that requires constant supervision when out of the cage because he's more than happy to explore the floor.