I have been looking a copper bits and wanted to know the pros and cons of a copper snaffle d-ring bit. before any one say that i shouldn't use a bit because their bad my horse doesn't respond well with hackamores. hateful people will be blocked.
Horses are said to like copper bits, just make sure that it has a nice curved mouthpiece, lots of D ring snaffles have very straight mouth peices which make them a harsh bit.
There is nothing wrong with copper. It is a softer metal, and if your horse chews a lot, the bit may develop rough spots. I have heard of some horses not liking it, but I have never noticed a difference. My personal preference is sweet iron. I've never had a horse, not heard of one that didn't like it. If your horses goes well in one, then it's the right bit for you.
Copper tends to make horses salivate more, which seems to make them softer in the bit. If your horse already salivates a lot, then I wouldn't get either copper or sweet iron. One of my horses used to actually foam at the mouth and drool with copper; others have just seemed a little moister (which is good). The rollers give your horse something to play with on her tongue. Many horses don't need this, but for some it's wonderful. It's like worry beads - calms them, and helps them focus on the bit. They'll play with them on their tongue. If your horse concentrates on playing with the bit and not on listening to you, then I'd go without the rollers, but usually that's not the case. The snaffle is a very, very mild bit, and an excellent means of communication with your horse. Unlike a hackamore or a bitless bridle, it provides a great deal of two way communication if you know how to read it. It's much kinder than a hackamore, and more versatile than a bitless. The advantage of the D-ring is that it provides more lateral control than a loose ring or an eggbutt. Under light pressure it's the same, but if a horse resists and you apply heavy pressure, the straight part of the D puts pressure on their face on the side you're turning away from, to help cue them to turn their head. It's also more stable in the mouth than the loose ring, just as an eggbutt is. Hope that answered your questions!