I left a Seresto flea collar on my 55 pound Labradoodle for 8 months. At the end of the 8 months before I had a chance to replace the collar, the groomer reported he had fleas. I immediately replaced the collar with a new one. This was done more than a week ago.
Unfortunately, Boo is still scratching. We have only seen one flea, but I'm guessing there must be others since he is scratching.
I'm surmising the fleas are due to eggs that hatched that the collar hasn't yet killed. This is concerning, because the directions say any new infestation will be killed in 2 hours.
Would I be able to add Capstar or other flea medication to assist the Seresto until his infestation is killed?
Jim & Sherri
02 Winnebago Sightseer 27c Class A;
"Scout" Springer Spaniel, gone but not forgotten;
"Boo" Chocolate Labradoodle.