Imagine owning 100 cars and you have 100 more coming in. They sit on your lot. This is a traffic jam. Manufacturers want to bring you more but you have no room because you can't sell any.
Now imagine having to fuel up those 100 cars with new, clean fuel daily, clean those 100 parking spots a couple times a day, detail all 100 vehicles every day, and pay your entire staff because those cars still need taken care of otherwise when the time comes you won't be able to sell them because they've all stopped running and rusted out.
100 head of cattle isn't cheap to keep alive. I know the cost of a farm with 35 head of cattle, 600 meat birds, a couple dozen layers, and 3 pigs, and we moved our animals to fresh grass daily. It's not cheap and unlike cars that just sit on a lot they still require the same care and same budget regardless of what's going on but without money coming in. That's the biggest issue. They don't merely depreciate or anything. They drain your account. Fast.