Request DNA Sexing Test for 1
 
*You may add on the test kit at $1/each. However, especially for bulk orders or those who plan to order often, I recommend you purchase the supplies to make your own collection kit which would be much more cost effective for you. You should be able to find all supplies on Amazon and some at your nearest wholesale store or pet store (suggested links below, but you may use your discretion at where to buy - just make sure it matches the description): 
0.2 ml  PCR micro centrifuge tubes with caps
Alcohol pads (cleaner to use individually wrapped pads to avoid cross contamination)
Styptic powder (you may also use corn starch)
small sealed baggie