Advantus Soft Chews for Dogs Flea Control Best by November 2023, but bottle is sealed, has never been opened. This listing is for one bottle, but two bottles are available. The Advantus Soft Chews for Dogs are designed for large to extra-large breed dogs weighing between 23 and 110 lbs. This flea control treatment, with an expiration date of November 2023, contains imidacloprid as the main ingredient. Made in Spain, this chew is ideal for adult dogs and offers relief from fleas and ticks. The convenient soft chew form is easy to give and ensures your furry friend stays protected from pesky parasites.