She says many cheap collars designed to control fleas do so by producing a toxin that gets into the animal's bloodstream.
"That's obviously an extreme reaction," she tells The Dodo. "But that's an example of what can happen. Obviously, every pet is different. We usually see it with the really little ones who can't tolerate it really well."
Let's face it. We freak out when our best furry friends get fleas. We can't stand to see them suffer.
But in our concern, we might over-scratch that itch.
"This time of year fleas and ticks are an issue," Harrelle explains. "People are reaching for what they think is a less expensive option."
The kitten, just weeks old, was admitted back in 2013. Her owner told medical staff she had used a Sergeant's brand collar, intended to kill both fleas and ticks.