My farrier wants to put slick shoes on my mares hind feet. He says the way she jams/stobs her back end into ground rating n going around, makes it a lil choppy. He said slides would smooth it out. Also, I have to inject hocks every 5 months. He said I'd probably get more life out of my injections. The ground I run her on is normally always good. She won't work on hard, slick ground, so I only enter where I'm familiar. What do y'all think? Im uneducated about slicks...

Ps, my farrier is a barrel racer, himself

I just don't like the idea. LOL Regular shoes should be ok. Do you mean sliders? Like reining horses have?

Keg shoes (regular shoes, not rim shoes) behind unless you're in bad, crawly/firm ground.

Cowboy sliders or regular sliders are usually a recipe for disaster in a barrel horse.

If "slicks" means regular keg shoes, thats a thumbs up

It does sound like a recipe for disaster.  I had one that jammed himself stopping and rating.  He was straight hocked and not only did I have to inject his hocks but his stifles as well.  I had a vet/farrier look at him and he had us over time adjust how he stood in back through the trim, not his shoes.  He was shod in a wide web keg on his hind.  It didn't totally fix the issue but it did reduce the time in between injections and didn't rattle my teeth as much when he rated or stopped.

If he is talking about a shoe like a Mustad TS8, I would say definitely yes!  That is similar to what I ran my rodeo horse in, we never had issues with them being too slick, and it definitely helped him smooth out in his turns and was easier on his hocks

Once a horse knows how to use them they can be great.  Futurity rope horses use them, reined cow horses use them and they make sharp turns at full speed.  If I were you, I'd give it a try.  If you dont like it, then try something else. 

ETA: I'd use a baby slider rathern than the full sliders.  

What about just leaving the horse barefoot behind?  Is that an option?  I'm with Liana, regular keg shoe would be the way to go rather than any type of slider, which may be what your farrier is referring to as a "slick" as opposed to a rim shoe or eventer type shoe.  If you could leave the horse barefoot behind, that would give a little more slide/less traction too.  

I have done something similar. I had a DTF bred mare that had a tendency to get really jabbing and would sore herself up with the way she used herself. We tried everything from injections, different training styles, time off etc. I had x-rays for my farrier to work off of and I was very particular where I ran her because those shoes are not for all ground. I thankfully only ran her in  those hind shoes a couple of cycles and honestly, she learned to use herself differently with them then I ended up going back to barefoot.

Note to add – I would have to ask my farrier what the name of the shoe was, it wasn’t a true wide sliding plate, but it did not have grooves like a standard or rim would. It was something similar to the 1/4” Kerckhaert Pride slider versus a traditional 7/8” + Kerckhaert Pride slider. 

I think with some honest, educational conversations with your farrier and vet you can find a solution. Let the horse feel them for a couple weeks in the pasture and then test them out in some practice runs or exhibitions. You can always remove them if you need to. 

As someone who shows reined cowhorse, we dont want a horse to slide by a cow going down the fence but want enough slide for stops in the dry work. Typically don't use the same sliders as the straight reiners do for those reasons. I also get mine tapped for studs for turnout and cutting.