Can Nutrition or Environment Affect CEA Severity? The Evidence Reviewed

Does diet, supplementation, or environmental exposure influence Collie Eye Anomaly severity? A critical review of the evidence — and an honest assessment of what we know, what we don't, and what breeders sometimes claim.

March 14, 2026

The Role of Modifier Genes in CEA Severity: What Current Research Tells Us

Why the same NHEJ1 mutation produces vastly different clinical outcomes. Exploring the modifier genes that influence Collie Eye Anomaly severity, current research findings, and implications for future genetic testing and breeding decisions.

February 26, 2026