I have one that is made to slide in a 16' flatbed box.
I've probably hauled 200-300 cows, calves and bulls on it
over the last 5 years.
Anybody that says it is junk doesn't have a clue as to what
were talking about or what it looks like.
One of the benifits is it isnt totally closed in so it don't look
like a trap, and cattle load easier.
Here are some problems I've experienced:
1. I had make a small gravel ramp to load with,
because it sits about 6" higher than a cattle trailer.
2. make sure your trailer has brakes before you haul cattle.
3. The slats at the bottom 30" were just far enough that
a cow could get her leg hung up inbetween them
( thats not what you want to see out your mirror
going down the turnpike.)
I had a one inch piece of angle iron welded between
each of the bottom slats.
4. Even if it fits in your trailer snug chain it down well.
5. Always balance your load approx 60-40 if possible.
lunker