ZOGUARD PLUS FLEA & TICK DROPS FOR DOGS UNDER 22LBS by ZOGUARD variants 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Please call the store at (434) 392-4192 to place your order. ZoGuard Plus Flea & Tick Drops for Dogs 0-22 lbs works quickly to kill adult fleas and ticks, and unlike other products, ZoGuard Plus eliminates flea eggs and larvae too.