hello~ when is the expiry date of this product? and dose it have a same ingredients with the revolution one? and which country made come from?

I wonder if Strongold has been approved by the FDA, a reputable organization like Revolution. It is said that the ingredients are the same, but I wonder if they are the same or the alternatives. I'd like to try Stronghold on my children, but I ask because there are many concerns. I hope you understand.

3.2kg Can I use it all for cats? I'm curious about the capacity.

I've used Stronghold (bought here) for a long time, and love it, but lately I'm finding it ineffective - the fleas are happy, the cats less so.... could a batch have been defective, or perhaps the fleas developed immunity and I should switch to something else for a while?

If I do a recurring purchase, how do I know what the price will be for the next shipment? Will it always be the same price or can it fluctuate more than 10%? I'm buying it at a sale price, would it be regular price next time?