Weight range?

  
Junior

979654
 
 
Purred: Sat Sep 4, '10 1:30pm PST 
Hello,
I'm a 150 lb english mastiff. My mom and dad put K9 Advantix on me. They are wondering if it works as well since I weigh 150 lbs. My vet called the company to find out, but they didn't really tell us much. Should they just put it on me more often? Any suggestions? I don't have problems with fleas, but the mosquito's are still biting me. Help please!