My gsp recently went lame on her front leg. Probably caused by awkwardly jumping from a high height! I had a fall a couple of years ago, - Zuma was mooching along behind me but on a long line and put a rabbit up about 2ft from his nose....inevitable result...me flat on floor

equivelant of my front leg and landing on wrist from a height

got home and took a couple of arnica pillules and a good slather of arnica cream, it made for much less swelling and bruising than expected but you do need to take/apply as soon as practical after the injury.
Homeopathic vet suggested giving arnica pillules after Zuma had abdominal surgery for suspected obstruction to lessen bruising/swelling which would speed healing of the wound