| O'chocobol'samour | ♂ | 2018 | FR | – | LOF 630 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| O'kdobol'amour | ♀ | 2018 | FR | – | LOF 633 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| O'malleybol'samour | ♂ | 2018 | FR | – | LOF 631 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| O.Ch. R Gr.Ch. Dual. Ch. (r) Callicoma Scarlet Runner Swe Swi Ccd. Ht Rae. Sprd.A Tdx. | ♀ | 2022 | – | – | – | – | – |
| Obi-Wan Yooranah | ♂ | 2015 | – | – | – | – | – |
| Obsydian Red Radimus | ♂ | 2019 | PL | Red Radimus (Radochna Iłłakowicz) | – | ♂ Callicoma Thorin Red Radimus | ♀ Cie Cib Ww-17 Ew-18 Pl Uch Pl Juch Ejw Scarlet Avalon Red Radimus |
| of Course Ned Star Red Radimus | ♂ | 2019 | PL | Red Radimus (Radochna Iłłakowicz) | – | ♂ Callicoma Thorin Red Radimus | ♀ Cie Cib Ww-17 Ew-18 Pl Uch Pl Juch Ejw Scarlet Avalon Red Radimus |
| Ogannayersrockbol'samour | ♀ | 2018 | FR | – | LOF 635/167 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| Oh No Jon Snow Red Radimus | ♂ | 2019 | PL | Red Radimus (Radochna Iłłakowicz) | – | ♂ Callicoma Thorin Red Radimus | ♀ Cie Cib Ww-17 Ew-18 Pl Uch Pl Juch Ejw Scarlet Avalon Red Radimus |
| On Fire Ygritte Red Radimus | ♀ | 2019 | PL | Red Radimus (Radochna Iłłakowicz) | PKR.I-92889 | ♂ Callicoma Thorin Red Radimus | ♀ Cie Cib Ww-17 Ew-18 Pl Uch Pl Juch Ejw Scarlet Avalon Red Radimus |
| One And Only Aria Red Radimus | ♀ | 2019 | PL | Red Radimus (Radochna Iłłakowicz) | – | ♂ Callicoma Thorin Red Radimus | ♀ Cie Cib Ww-17 Ew-18 Pl Uch Pl Juch Ejw Scarlet Avalon Red Radimus |
| One Brown Mount Mckinkey | ♀ | 2021 | CZ | – | CMKU/AKE/679/21 | – | ♀ Inge Black Mount Mckinkey |
| Onebol'samour | ♂ | 2018 | FR | – | LOF 632/128 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| Orchid Black Mount Mckinkey | ♀ | 2021 | CZ | – | CMKU/AKE/680/21 | – | ♀ Inge Black Mount Mckinkey |
| Osha Red Radimus | ♀ | 2019 | PL | Red Radimus (Radochna Iłłakowicz) | – | ♂ Callicoma Thorin Red Radimus | ♀ Cie Cib Ww-17 Ew-18 Pl Uch Pl Juch Ejw Scarlet Avalon Red Radimus |
| Ouijabol'samour | ♀ | 2018 | FR | – | LOF 634 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| Oumybol'samour | ♀ | 2018 | FR | – | LOF 636 | ♂ Boyd's Bullriding El Dorado | ♀ Alice Aus Enyy's Kelpie Familie |
| Outbacklightnings Amazing Lilly | ♀ | 2015 | – | – | – | – | – |
| Outbacklightnings Beasty Big Bee | ♀ | 2017 | – | – | VDH 17/135 00248 | – | ♀ Magic March Kelpiebrink |
| Outbacklightnings Beasty Brownie | ♀ | 2017 | DE | – | VDH 17/135 00249 | – | ♀ Magic March Kelpiebrink |