Just resume the dose as normal do not double dose because of the Ivermectin that is in heartgard. You will be fine!!!! They have to miss more then a month for the medication to be out of their system...It stays in the system for 30 days (per the maker), but actually last a little longer...It is like it works ahead of time....The thing on doing it each month depends on where you live my personal opinion is they should be on it all the time (year round) it only takes one skeeter and they are more common year round then ever before in the past. I also agree that frontline/advantix products should be all year because of the ticks and for us southern states the fleas are 24/7/365 too.....sumyasmom\";p=\"63907 said:anyone know if i can just resume as normal or do i double dose?
Sentinal is an all in one and a great one!!!!! I would not change!Donya\";p=\"64101 said:i think maverick is on something called sentinal and he takes it once a month, just one pill to take care of all parasites and heartworm? should i be putting him on something else as well?