Can you use bio spot for dogs on cats?

No.

Bio Spot products are specifically formulated for dogs and should not be used on cats. Cats are much smaller than dogs and have a different metabolism, so using a dog product on a cat could be dangerous. Bio Spot products contain permethrin, which is an insecticide that can be toxic to cats. Symptoms of permethrin poisoning in cats can include vomiting, diarrhea, seizures, and even death.

If you are looking for a flea and tick treatment for your cat, there are several products available that are specifically designed for cats. These products are safe for use on cats and will effectively kill fleas and ticks. Talk to your veterinarian about which flea and tick treatment is right for your cat.