Are you talking about mineral blocks or protein blocks?
If you're talking about mineral/salt blocks any will work, but you might as well get the trace mineral blocks with salt.
If you're talking about the protein blocks, then make sure that they are suitable for horses and not just cattle because the high protein blocks can kill horses and deer won't eat them.
If you're talking about mineral/salt blocks any will work, but you might as well get the trace mineral blocks with salt.
If you're talking about the protein blocks, then make sure that they are suitable for horses and not just cattle because the high protein blocks can kill horses and deer won't eat them.
