I use the regular plastic "Dura-Forks". I usually purchase them in purple as that is our farm color. We usually have to replace them yearly - I'm hard on the plastic tines plus do lots of manure pick up. I do also have one mini sized one - but they made the handle mini sized too and I can't use it for long as it kills my back to bend over to use it. Most of the doggie scoops are also much too short. Our larger minis and shetland ponies on free choice hay have large piles and aren't generally stalled so the larger pics work very well. Been a long, long time since I've even seen one of those metal picks - didn't realize they were still being made!
I favor the "grabber tool" - we have lots of down twigs and small limbs. I can pick them up w/o bending over. Also allows me to reach a brush that may have fallen where you can't reach it or a "hidden egg" when the hens decide they'd rather lay anywhere but their nesting boxes! I can also use it from the seat of the lawn mower when I'm doing pastures if there is something out there that shouldn't be mowed over (twine, a larger twig, plastic trash bags, a brick). I'm going to purchase one of those lawn bag opener tools next payday - we have 1 mini stallion boarding who is fed from a net - hopefully will make it easier/faster to load w/ hay and not be a waste of $$.
I laughed quite hard over your description of your metal curry, AngC, as the metal curry's were never made (originally) to be used directly on any horse. They were to be used as a "cleaner" for your body brushes (stiff, medium and soft), while using it on your horse. Most old timey grooming books state that. Don't think any of the grooming books in the last 10 years do, though. That said - I use it a LOT on all of our ponies during the winter. It's often the only grooming tool I use on necks, chests, bellies & rumps to clean off mud and to help shed them out in the spring. Used it this spring to take the matts off of the two tiny boys (31" at the withers) up thru June since they didn't want to shed out. None of ours will tolerate it during the summer when they have their short coats or if they are clipped (why would you need it on a clipped horse?)...
My favorite grooming tool, however, is those bath scrubbies. Both the round ones that fit in the palm of your hand or a little larger and the mitts (preferred). I use them for bathing (you can really spread both shampoo and conditioner over the body with mitts) and also keep at least one and sometimes two in the grooming buckets for the ponies. LOVE the mitts during the summer - off comes a bridle and I use a mitt on each hand to "scrub" the sweat away on both sides of the head at the same time. They lean into the "massage". It also works great to remove mud and sand from legs and can help during the shed in the spring. When dirty, just toss em in the washer, and they are dry by the time they go back out to the barn. Or give the dirty one a quick rinse before using it to bathe your horse and it comes clean. There was a time when our 3 daughters had color coordinated grooming tools for their horses/ponies - I would pick up "their" colors whenever I found them, LOL(purple/lavender - farm color, red - youngest, pink - middle, teal or lime green - oldest).
During the fall/spring - I use a "grill block" (I no longer have a source for those) or a Farnam "block" to remove bot eggs and long hairs on the legs.
I also love rubber curry combs and you will find all types of them around our barn - mood changes or hand is sore (here in the south - hands swell w/ humidity - sometimes hard to use some grooming tools) - I switch to a different one. I am a bit and grooming tool "junkie" so will buy them whenever I see ones I've not been able to find and want or a new one - if I have the extra $$ when I find them.
Does anyone have a good source for a stiff brush that works on the ponies/mini horses? Most of our tack stores only seem to carry the medium and soft bristle brushes these days... Oh, and my color preference has gotten me into trouble w/ brushes. Have purchased most of the new style brushes in the past several years and they may be pretty colors but they sure don't make them like they used to! The bristle fall/pull out and get tangled in our ponies' coats! UGH. Funny - I still have brushes I started with (and USE a lot) in 1995, but the new, pretty colored brushes - lucky to get one season of grooming out of them before they fall apart. I'd have to go to the barn to give you name brands... But several are carried by the regular as well as mini tack catalogs...