SallyAnne,

If you are interested in obtaining more infusers go to:www.petguys.com

I just ordered one (and an extra bottle) from them a couple of weeks ago. Their price was MUCH cheaper than my local PetSmart (even with the delivery charge). The items arrived within the week, but they don't seem to be having the desired effect on my fosters (which is a different story)...

Cheryl