Since we have designed and tested Fi specifically for dogs, our product isn't optimized for cats, horses or any other pet other than dogs at this time.
We do not recommend using Fi to track your cat or horse, as we don't expect a comfortable fit or optimal performance.
It is lightweight and can comfortably fit dogs 10lbs or more, with neck circumferences of 11.5" and up.
While we don't have an extra small size developed at the moment, we hope to have one at some point in the future!
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