Genetic parameters for chronic progressive lymphedema (CPL) associated traits in Belgian Draught Horses were estimated, using a multi-trait animal model. Clinical scores of CPL in the 4 limbs/horse (CPLclin), skinfold thickness and hair samples (hair diameter), were studied. Due to CPLclin uncertainty in younger horses (progressive CPL character), a restricted dataset (D_3+) was formed, excluding records from horses under 3 years from the complete dataset (D_full). Age, gender, coat colour and limb hair pigmentation were included as fixed, permanent environment and date of recording as random effects. Higher CPLclin certainty (D_3+) increased heritability coefficients of, and genetic correlations between traits, with CPLclin heritabilities (s.e). for the respective datasets: 0.11 (0.06) and 0.26 (0.05). A large proportion of the CPLclin variance was attributed to the permanent environmental effect in D_full, but less in D_3+. Date of recording explained a proportion of variance from 0.09±0.03 to 0.61±0.08. Additive genetic correlations between CPLclin and both skinfold thickness and hair diameter showed the latter 2 traits cannot be used as a direct diagnostic aid for CPL. Due to the relatively low heritability of CPLclin, selection should focus on estimated breeding values (from repeated clinical examinations) to reduce CPL occurrence in the Belgian Draught Horse.