The cornell_canine plink files accompanies:

Complex disease and phenotype mapping in the domestic dog, Hayward, Jessica J., Castelhano, 
Marta G., Oliveira, Kyle C., Corey, Elizabeth, Balkman, Cheryl, Baxter, Tara L., Casal, 
Margret L., Center, Sharon A., Fang, Meiying, Garrison, Susan J., Kalla, Sara E., Korniliev, 
Pavel, Kotlikoff, Michael I., Moise, N.S., Shannon, Laura M., Simpson, Kenneth W., Sutter, 
Nathan B., Todhunter, Rory J., Boyko, Adam R.

These files contain 160,727 SNPs that remained after phasing with a minor allele frequency 
(MAF) filter of >0.01.

cornell_canine.fam - ID and sex information for each dog
cornell_canine.bim - chromosome, name, location, alleles for each SNP
cornell_canine.bed - genotypes for each dog at each SNP
phenotypes.txt - phenotypes for each dog.