The dose we gave her this morning from the new bottle was way more than she is supposed to take.
So, this was a potentially lethal dose
for a cat. Luckily, I noticed early that there was something seriously wrong with her. She was howling, and didn't resist when I picked her up to snuggle her (with this cat, attempts at snuggling are usually met with sharp claws!) I called the vet and he discovered the mistake and told me to rush her in.