| Equid | Horse Name ▲ | Breed | Age | Gender | Color | Discipline | Owner |
|---|---|---|---|---|---|---|---|
| 488427B | Insulted The Wrong Man | Thoroughbred | SY27 (1yo) | Stallion | Buckskin | FR | Morrigan |
| 509121B | Interdicted | Irish Sport Horse | SY21 (7yo) | Stallion | Bay | EV | Rhianon |
| 181011C | Intergalactic | Appaloosa | SY11 (17yo) | Mare | Palomino Leopard | WW | Lissa |
| 460824C | International Federation of Oopsie Daisy | Paint Horse | SY24 (4yo) | Mare | Dunskin Tobiano | SR | Morrigan |
| 355018C | Interrobang | Trakehner | SY18 (10yo) | Mare | Bay | EV | Merry |
| 144518C | Into The Grey | Holsteiner | SY18 (10yo) | Mare | Grey | CC | The Orchard |
| 383023B | Invader Fox | Thoroughbred | SY24 (4yo) | Mare | Smoky Black | HU | Izabella |
| 265822B | Invader Op | Thoroughbred | SY22 (6yo) | Stallion | Grey Sabino Overo | FR | Lissa |
| 149013C | Invisible Ink | Thoroughbred | SY13 (15yo) | Mare | Bay | CC | Lissa |
| 266522B | Invisible Problems | Thoroughbred | SY22 (6yo) | Mare | Bay Sabino | FR | Lissa |
| 498724B | Invocation SW | Holsteiner | SY24 (4yo) | Mare | Bay | JP | The Orchard |
| 462224B | Irish Goodbye CCR | Quarter Horse | SY24 (4yo) | Stallion | Chestnut | WW | Merry |
| 232722B | Iron Aardvark | Appaloosa | SY22 (6yo) | Mare | Buckskin Blanket | SR | Lissa |
| 180211C | Iron Butterfly | Appaloosa | SY11 (17yo) | Mare | Bay Leopard | WW | Lissa |
| 310815C | Iron Heart | Irish Draught | SY15 (13yo) | Gelding | Grey | CC | Jewel |
| 325022B | Iron Man FRF | Morgan | SY22 (6yo) | Stallion | Palomino | DV | Rhianon |
| 182416C | Iron Wraith | Danish Warmblood | SY16 (12yo) | Stallion | Grey | CC | Soleil |
| 265014C | Ironbound | British Spotted Pony | SY14 (14yo) | Stallion | Chestnut Leopard | PR | Mariah |
| 377216C | Ironmark SW | Dutch Harness Horse | SY16 (12yo) | Stallion | Grey | SS | Soleil |
| 373915C | Irreplaceable | Morgan | SY15 (13yo) | Mare | Chestnut | SS | Rhianon |
| 309019C | ISeeUAndIHearU | American Mustang | SY19 (9yo) | Mare | Chestnut Sabino | TC | Morrigan |
| 335321C | Ishaan | Marwari | SY21 (7yo) | Stallion | Grey | TC | Manders |
| 105118B | Isidora | Cruzado | SY18 (10yo) | Mare | Amber Champagne | DG | Dani |
| 402518C | Isolde | Friesian | SY18 (10yo) | Mare | Black | DG | Faline |
| 427926B | It Was A Ghost | Thoroughbred | SY26 (2yo) | Mare | Black | FR | Morrigan |
