Logan (2017)

In the scene where we see a border patrolman with a dog on a leash,
production hid a water bowl behind the guard post, where he drank water
between takes. The dog was also placed in a trailer with air conditioning
between takes as well.

In the scene where we see a horse trailer pull up on the side of the road
and a few horses escape the trailer and run across a busy freeway, nearly
being hit by trucks, before people bring them back to the side of the road,
this sequence was shot in several blocks. The horses never came close to
trucks. Those trucks were inserted in the scene through CGI in post
production. A horse trailer was parked on grass off the side of the road.
The horses were tied inside the trailer with a halter and lead rope. The
road was completely closed for filming with the local police at all
entrances. On action, the let the horses go, with men riding the horses.
When the first two horses get to the roadway, a cue to the riders is given
to pull back on the reins (this will simulate the time point when the CGI
inserted truck will pass them on the roadway.) The image of the riders will
also be erased in post production. The horses are all mounted by riders
wearing blue suits, which are riding bareback. The horses’ reins and saddle
pads were also covered with blue gaffer tape to be removed in post.

When we see the car swerve off the road with the horses in the trailer, the
horses in that scene were fake. And when we see the men gather the horses
and ride them back to the side of the road, those were trainers, dressed
like the actors.