Compatibility of Flea Products

Q: Baxter is a 14 week old under 4 pound teddy bear pup and I am using Sentinel flavor tab for puppies 2-10 pounds. It is advertised to help control fleas. I saw what I thought was a flea on his chest (it was light brown in color) and moved so quickly I couldn't find it again. Should I use an external application for fleas on him or depend upon the Sentinel for heartworms to be enough? He gets the heartworm flavor tab on the first day of the month, which is tomorrow. Thank you for your help.

A: Sentinel contains a flea control product called lufenuron which actually does not kill fleas it keeps their eggs from hatching. Some products that kill fleas and are compatible with Sentinel are Frontline, Advantix and Comfortis. All are reliable and safe I personally use Frontline because it also provides very good tick control. Advantix provides tick control also but Comfortis does not.