Hi, Our success rate is 98% delivery and 80% of it under the predicted 15 working days mark. However if any problems occur we have a policy which enables us to re-ship or refund your money if you don't receive your product. We have over 10K happy customers, you can check our review section on the website.

The active ingredient is Selamectin.

Revolution is safe for pregnant cats according to the product label. However, you should always consult a veterinarian before administering any medication to a pregnant animal.

Please email support@petbucket.com for quotes on large orders. We carry Revolution for cats in 6 pk here http://goo.gl/Kb4fOI

Unfortunately it doesn't work for ticks. I suggest Using Advantix for Tick prevention http://www.petbucket.com/b/2268311/1/advantix.html