She sounds like feisty ball of fur!
I'm guessing it was Hartz. I've never needed KMR but I've looked (you never know what can/will happen) and that's all I've ever seen at Wal-Mart. It's been quite interesting reading all this though still sorry about Gravity and Sparrow though.
My WalMart is really bad about keeping cat supplies in stock, other than food and litter, and some toys. I never have a problem if I buy their food there, but I can never find anything else I need, such as bottles or KMR. They have some brand that comes in a carton, but when I looked at them when I had Gravity, I didn't want to go with it. I can't remember the name, but mine hasn't ever had the PetAg, only Petsmart, but now I know Tractor Supply has it now too. They will be my go-to for the next ones. It's $8.99/can there. Petsmart was having a sale on all GNC stuff today, buy one, get one half off, and I was like booooooo! lol