33.0 33.1 "Summary results of the Purebred Dog Health Survey for American Cocker Spaniels" (PDF). The Kennel Club. සම්ප්‍රවේශය 22 January 2011.↑ 34.0 34.1 "Summary results of the Purebred Dog Health Survey for English Cocker Spaniels" (PDF). The Kennel Club. සම්ප්‍රවේශය 22 January 2011.↑ "Hip Dysplasia Statistics". Orthopedic Foundation for Animals. December 2009. සම්ප්‍රවේශය 1 May 2010.↑ 36.0 36.1 Thomas, Dennis W. "An Ear Full of Auditory Advice". Working Dogs.com. සම්ප්‍රවේශය 2 May 2010.↑ Smith, DVM, Marty. "Progressive Retinal Atrophy/Degeneration in Dogs". PetEducation.com. සම්ප්‍රවේශය 1 May 2010.↑ Acland, Gregory M (2 January 1998). "Linkage analysis and comparative mapping of canine progressive rod–cone degeneration (prcd) establishes potential locus homology with retinitis pigmentosa (RP17) in humans". UK PubMed Central. සම්ප්‍රවේශය 1 May 2010. {{cite web}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)[භින්න වූ සබැඳිය]↑ "What is glaucoma?". Cani