If you have already ditched your box with the tag in it simply contact Merial at 888-637-4251 and ask them to send you one. I also mentioned how all the coupons inside had expired before I even got the kits from my vet. The agent instructed me to ask my vet for a new kit. But I also did my own little search on the net and found a coupon for - Frontline - http://frontline.us.merial.com/web_coupon.pdf and one for - Heartgard - http://heartgard.us.merial.com/ - Interceptor - http://www.petwellness.com/pdf/int_rebate.pdf and lastly here is a link for the coupon offer for - K9 Advantage/Advatix - http://advantage.petparents.com/specialOffers.cfm?adType=
Comparison Shopping pages: http://k9advantix.petparents.com/compare.cfm - K9 Advantix & Frontline Plus;
I am not sure what products everyone has chosen to use for flea and Heartworm prevention but I think I have covered all bases. Do a bit of research to see what each product covers and what is needed more in your neck of the woods.
Then Chime in ... Let us know what you have chosen and why.