[targonrotts]

we start heartgard on pups at 8 weeks of age at our clinic.
it is quite safe. in florida, it is year round. and now a days it is suggested it should be the same everywhere.
0-25 lbs once a month until he hits 26 lbs, then 26-50, then 51-100.
there are a few forms of heartgard. the tablet which is only for heartworm prevention and heartgard plus chewable which does heartworms and helps control hooks and rounds.
even while on prevention, you should at least do a heartworm test a year and at least one to two fecal tests a year to make sure all is working well.