I have been using Frontline on my 115 lb dog & over the weekend I attended a pet clinic which offered heartworm test & pills. I purchased Sentinel & when I got home I realized Sentinel is also for fleas. Is it safe to give my dog Sentinel & have him on Frontline? Thank you!
Yes, it is safe but it is a bit overkill. Why don;t you use a tick collar instead. vetcare