WOW, you must be smarter than all those MOUSE studies that they base drug use upon, seems most studies are on animals to see if drugs would work for humans.
I had a cat once that weighed about a pound, maybe 2 at the most, it could not raise it's own head, i assume it had the feline leukminia, because most of the cats in the entire neighborhood ALL DIED. I gave this near dead cat HUGE DOSES of cayenne and tinctured (alcohol) herbs, to make a long story short, the cat weighed about 10# a month later and being male, I assume he had to travel far to find a lady friend because all that he had grown up around were all DEAD. I will assume a coyote got him, because after a few round trips he never came back, that or someone took him in as a house cat.
The WORSE things about CATS are they are small and NO ONE takes care of them until they are near dead.
The ONLY THING I CAN SAY about your theory is that your science probably is about VACCINATED CATSm because no good scicentist would experiement on a non-vaccinated cat and odds are they stole the cat or purchased it to TORTURE in a grant provided lab.
I agree with you, don't give good herbs to vaccinated cats, same goes to vaccinated humans, let them decide on their own what is best and with the cat, he will choose green grass, which is his best medicine.
Dr. John R. Christopher and his son today hear all kind of crap about herbs because of some study that used false data to prove a point that usually turns out FALSE a few years later when a grant pays the same scientist to study a differant theory.
I don't suggest anyone use herbs as medicines and when people do use herbs they are self experimenting which is their right.
With your specific theory, it would be interesting just how you dewormed the cat and even if you used a herb dewormer, who knows that the oregano did not work allot better. If you used my dewormer the joke is on you, it has plenty of oregano in it and so far has been used in some incredable doses, etc.
PUPPY can take 15 drops of pure oregano and in 15 seconds be perfectly normal. I don't have any cats thanks to all the coyotes, but if I did I would know if your theroy had any weight to it. I will bet a NON-VACCINATED FARM CAT (and not some toxic city cat)could take the pure oregano by mouth with ZERO PROBLEMS, because the farm cat could always eat grass when needed, if needed.
Dr. Christopher proved every scientific test that stated certain herbs were bad by simple looking at the data and seen how flawed they had to do it to get their false finding that had no evidence.
Take the case of comfrey, a few who hated Dr. Christopher tried for many, many years to say his comfrey was not usable to the liver just the same way your saying the poor cat can't handle oregano today. Dr. Christopher proved them all wrong while he was alive, but after the factory sold many times, a owner bowed down and agreed to take comfrey out of the formulas and the company floundered and went backrupt and David Christopher took it back and rebuilt it, but the agreement about comfrey stuck because of the agreement the prior owners made with the fda, the same fda that haunted Dr. Christopher much of his life, but was not able to ever find one human that would say one bad thing about comfrey or any herb he used.
"IF" I believed that cats could not handle oregano, I would have to assume they could not handle comfrey as well. The only thing I can say is no one or no animal chooses when it dies, same as none chooses when they shale be born.
It would also be interesting to know how much oregano was used and how it was used, as well as the cats diet and present condition before it was fed oregano. Normally the animal is 90% dead when a owner tries a last resort herb, but who knows in this case and it does not matter, time is better spent on the living and not the dead. "IF" the question lengers I will have to go next door and snatch one of my neighbors many half wild barn cats and see how well it likes oregano.
The reason I do not believe the theory is because the CAT eats darn near anything as well does it eat herbs, that proves to me the cat liver can handle allot of things.