Rabies Shot

I have multiple cats.

A few days ago I took some of my cats to a local free rabies clinic.

I have 2 white cats.....the only way to tell them apart is one of them has a faint narrow grey "line" on the top of her head.

My daughter & I "rounded up" 5 cats.....one of them a white cat.

Unfortunately, in the rush to get to the rabies clinic on time, we didn't take note of which white cat we took.

My question is......I need to get the other white cat her rabies shot. If at the next rabies clinic (in 2 weeks) I take both white cats & they both get the rabies shot, will that harm the cat that has already had the rabies shot?  Or......if I wait awhile, how long should I wait?  There is always the potential for a cat to get outside & we live in a rural area.

Thanks for any advice.

I'm not sure how to answer this. Perhaps just call your vet for advise. Ask about the prevalence of rabies in your area. If its low, then it may not be that big of an issue to wait a year for shots for both of them. If a double vaccine doesn't hurt, then you are OK to do one of the cats twice.