After purchasing the canine distemper test paper, the owner can use a cotton swab to dip some of the dog's nose or blood, drop or smear it on the S area of ​​the test paper, wait for about 10 minutes, and check the C and T areas of the test paper to see if two lines appear. Red line, if it is positive, you have canine distemper. If only the red line appears in zone C, it means you are not suffering from canine distemper. If a red line appears in the T zone or no red line appears, the test may have failed and you need to purchase other test strips and test again.