Just received a reply from my vet in the states and asked if she carries Seresto and they do not. They carry another flea and tick collar called Scalibor for a 6 month protection at $49.00 U.S I may try that. The TSC in the U.S is charging $59.00 for the Seresto collar. Liberty flea and tick liquid application is on sale for $9.99 and is similar to Advantix II but the Liberty 50 star rating is very low. My brother used it on his labs with success. Will treat the dogs with ivomec this summer as well much cheaper than heartguard.