Sadie was born in October and I got her end of December. From her first vet visit she was given a monthly Sentinel. She just had her third one today. The vet charges a pretty penny though and I know I can get it cheaper elsewhere. To my knowledge she's never been tested but I think they do that around 7 months??momoftwo said:I use Interceptor as well. My vet will not use Heartguard on poodles as she has had a bad outcome. I have also read other cases on the web about problems with Heartguard and poodles. In my vets mind it was not worth the risk with Dante being part poodle since other products are available. I buy my Interceptor from the vet - $25 for 6 months. I've not shoped around on price.
Remember, your dog needs a blood test to check for heartworm before starting the medication. If they already have heartworm giving the preventative is a big no no.