deworming poison, time before passed through animal?

Hello, I'm wondering about how long it takes for a deworming solution to pass threw cattle?

I'm assuming that any cow I buy, will have been dewormed, and I don't want that poison on any of my pastures. It kills the life in the soil, so I would build a quarantine area where all of the waste would be sent to a containment area where it would not get on my pastures. I'm thinking a separate septic system [only used for the quarantine area] from the main house so as to not disturb the anaerobic action going on in that system.

So, if a new cow was dewormed just before auction, how long would I need to keep it in a quarantine area for all of the poison to have passed threw her? All I've been able to find with Google is shelf life of the poison before giving it to the animal. I would assume that within 72 hours it should all be gone?

I figure I could get enough use out of a quarantine area to make it worth building. It could be used for cattle, pigs, and even poultry brought onto the ranch/farm. Don't want to let any nasties into the private eco system I'll be establishing.

It should get plenty of use while establishing herds, and later on, could be re purposed for other uses. Maybe as a platform for running a mobile slaughterhouse setup, or an area to hold animals while they are waiting for pickup/delivery.

Be sure to search on the dewormer chemical name, not just the brand name. For example Acetaminophen not Tylenol. Also try terms Pharmacokinetics and "Safety Data Sheet".

I did a brief search on one dewormer and the data sheet stated that ruminant's bodies hold onto the chemical longer than non-ruminants. Six days vs Three days.

I use this routine on human meds but it seems to work with veterinary meds too.

Thanks for the info. I would of never considered that it takes them longer to pass a chemical.