Line risk, popular sires & COI

work in progress · experimental

Preliminary signal, not breeding advice

This page uses only the parent relationships currently available for Bearded Collies with a Dutch link. Missing imports, foreign lines and incomplete older ancestors can distort the outcome.

Use this as a starting point to spot patterns — not as a hard list of “good” or “bad” lines.

9,348 dogs in analysisexperimental COImax. 8 generations

COI categories, all dogs

COI < 5%7,012 dogs

COI 5–10%920 dogs

COI 10–20%666 dogs

COI 20–30%490 dogs

COI 30–40%142 dogs

COI 40–50%109 dogs

COI > 50%9 dogs

How to read this

A popular male does not automatically create high inbreeding in every combination, but it increases the chance that many dogs share the same ancestors.

These numbers describe what is visible in the current database only.

COI by birth year

The table shows how many dogs fall into each experimental COI category per birth year.

Year	COI < 5%	COI 5–10%	COI 10–20%	COI 20–30%	COI 30–40%	COI 40–50%	COI > 50%	Total
1982	2							2
1983	8							8
1984	10		1					11
1985	21							21
1986	24	2	1					27
1987	14	2		2	1			19
1988	23	1						24
1989	40	1	4	2				47
1990	90		17	1				108
1991	304	26	16	13				359
1992	354	24	15	11		9		413
1993	311	61	11	43	1			427
1994	261	32	22	37				352
1995	349	40	7	15	4	9		424
1996	284	58	44	4	15	10		415
1997	215	48	14	13	35			325
1998	187	33	43	27	12			302
1999	198	47	27	10	1	5		288
2000	146	23	29	26	23	8		255
2001	123	28	36	41	10	5		243
2002	140	37	17	41	10			245
2003	86	16	77	44	3	8		234
2004	177	19	39	40	10	8	9	302
2005	116	25	38	28	1	7		215
2006	138	11	23	26		16		214
2007	188	47	33	12		12		292
2008	102	18	15	22	9	4		170
2009	159	22	23	16				220
2010	139	29	26	2		6		202
2011	104	32	31					167
2012	167	23	1					191
2013	104	46	5		6			161
2014	129	30	9	6				174
2015	127	21	8					156
2016	139	14						153
2017	142	41	17					200
2018	85	3						88
2019	123	6						129
2020	107	6						113
2021	99	7	5					111
2022	117	13						130
2023	79	7						86
2024	39	7	5					51
2025	45	3						48
2026	16							16

Most used males

Male	Offspring	Litters
CHARNCROFT CALEB	300	52
BRITANNIA STARS AND STRIPES	251	36
SEAGULL SWEEPS THE BOARD	155	34
BRITANNIA HERE COMES THE SON	153	23
ANSARA HIS-N-HERS CHECKMATE	145	24
PEPPERJAY ADVENTURE STORY	138	22
YELLOWSTONE OF DEBORA'S FARM	134	19
GILLABER PITSCOTTIE	130	21
FIRSTPRIZEBEARS GRAND CANYON	109	19
RIVER BELLE'S NOBLE-NEIL	107	17
MOONHILL'S FIRST CLASS BEAR	99	16
SCOTTSDALE ORIGINAL	95	13
CHARNCROFT COOL TOUCH	94	15
OSMART KATYS BLACK STUART	91	13
SHILSTONE CHOIR BOY	86	24
FIRSTPRIZEBEARS ALCATRAZ	84	10
SOMETHING ELSE MONSIEUR	82	15
RAMBERHAY RING THE BELL	78	14
BRIGHT GLINT'S LIBERACE	76	10
BENDALE STERLING SILVER	74	14

Ancestor pressure within 5 generations

Ancestor	Dogs	Path occurrences
BLUMBERG HADRIANA OF POTTERDALE	3,902	5,909
POTTERDALE PHILOSOPHER	3,463	5,595
PEPPERLAND LYRIC JOHN AT POTTERDALE	3,428	5,670
POTTERDALE PRELUDE	2,983	3,849
POTTERDALE ANDERSON AT RAMSGROVE	2,950	4,551
SHILSTONE CHOIR BOY	2,814	6,378
ORORAS FRANK	2,785	3,919
POTTERDALE CONCLUSION	2,380	2,766
BLUMBERG DE ROOS ERASMUS	2,353	2,741
POTTERDALE SERENADE	2,307	4,872
TAMEVALLEY EASTER SONG OF POTTERDALE	2,284	3,223
CHLOE OF BLUMBERG	2,232	2,575
WISHANGER BUTTERTUBS PASS BY QUINBURY	2,201	2,844
PEPPERLAND PANDAMONIUM	2,201	2,844
DAVEALEX WILLY WUMPKINS	2,080	2,899
PEPPERLAND ANDY PANDA AT RAMSGROVE	1,911	2,407
OSMART BONNIE BLUE BRAID	1,881	2,366
CHARNCROFT CLOVERGLEN	1,726	1,950
CHARNCROFT CALEB	1,637	1,865
CHARNCROFT COPPER SURPRISE	1,548	1,745