Shetland Sheepdog health: what owners should know

Known predispositions include collie eye anomaly and progressive retinal atrophy, both of which affect vision, hypothyroidism, an inflammatory skin and muscle condition called dermatomyositis, and gallbladder disease in middle age. Many Shelties also carry the MDR1 gene variant, which makes them unusually sensitive to certain common medications. Responsible breeders have puppies' eyes examined by a specialist, test for MDR1 and other available DNA markers, and check hips.

Find out your dog's MDR1 status and make sure every vet who treats it knows the result. Keep your Sheltie lean, keep up with dental care, since small mouths gather tartar, and book a vet visit if you notice weight gain without a change in diet, thinning hair with sluggishness, bumping into things in dim light, or scabs on the face, ears or legs.