The PREVENTIC Tick Collar by VIRBAC is the only tick collar that detaches and kills ticks effectively. It is effective for 3 months and is a good complement to Advantage or PROGRAM when tick protection is also required. Recommended for use on dogs/puppies 3 months and older.
Compare Preventic Amitraz Tick Collar for Dogs to Seresto to Trifexis
If you use Seresto, though, you'll need to remove the collar before any meet and greets. Kids at the meet and greets around here inevitably grab my dogs' collars, look at their tags, etc., and we're not at a spot where the kids can immediately wash their hands. Preventic is designed for ticks only, not for fleas. I think very few people will have tried Seresto on their greyhounds simply because almost every greyhound group advises against collars for flea prevention, even if they recommend Preventic for ticks. There is one person on Greytalk using Seresto for her dogs; she's been using it for less than a month, I think, but you might PM her to see if she has anything more recent than her
You can always rub off the excess oil on your dogs from a topical after the first 24 hours or so. When I've needed to do that, a dry paper towel got off the worst of the oil. These days, I'm using Advantage Multi (heartworm plus flea, but not ticks), which leaves a huge slick, but it's faded to nearly nothing in about 18 hours, invisible by 24. If I give it on Monday, there's not even a trace of the smell by Wednesday, and my girl's good for meet and greets by Saturday.
What will you use for heartworm if your guys can't handle the Trifexis? My guys--especially my old guy--are prone to diarrhea at the drop of a hat, so I've avoided Trifexis. Both of mine got diarrhea from Heartgard Plus, and Interceptor will not be available in the U.S. anymore. Sentinel will be available soon, and that's for heartworm + fleas, so that plus a Preventic collar might be safer for your guys and would avoid the problems of the topical--if your guys can handle the ingredients in Sentinel.
Flea and Tick Products: Preventic Tick Collar for Dogs
Preventic Tick Collar for Dogs prevents attachment of ticks. Detaches existing ticks within 48 hours. Kills ticks for 3 months. Aids in prevention from tick-borne disease. Virtually 100% of attached ticks are detached after 48 hours. Active ingredient Amitraz. For use in dogs. Do not use under 12 weeks of age. Cut off and dispose of excess length.
Preventic Tick Collar for Dogs - Tick Prevention - Pet Rescue Rx.