Ferret B-cell receptor research has begun to address an important limitation in this species: incomplete immunoglobulin germline annotation. Using available genomic information, one study annotated candidate variable, diversity, and joining segments across the heavy-, kappa-, and lambda-chain loci and designed multiplex PCR primers to recover recombined antibody sequences from sorted ferret B cells. The analysis identified 20 potentially functional IGHV genes, seven putative IGHD segments, five IGHJ segments, 48 potentially functional IGKV genes, and 32 potentially functional IGLV genes, while recovered B-cell sequences also suggested additional germline or allelic variants not fully represented in the available reference genome. The work further showed that paired heavy- and light-chain sequences could be recovered and used for recombinant antibody expression. These findings do not validate a phage-display library, but they are directly relevant to ferret library construction because they demonstrate why primer design and sequence annotation should remain source-aware and revisable. Apparent family usage, diversity, and clone assignment can be influenced by gaps in the underlying germline reference, particularly in genetically outbred animals.