You're speaking with Dr. Michael Salkin. Welcome to JustAnswer. I'm currently typing up my reply.
No, Laura. If you had put the dog product on the cat, instead, your cat might have been harmed by the higher amount of moxidectin in the dog product.
I never met Dr. Schwabe although he was there when I was. (I'm old!) Your dog will remain well. No need to repeat dosing on your dog.
You're welcome, Laura.
Thank you for your kind accept. I appreciate it.