Yes! Puppies can be tested, as their DNA results do not change with age. However, care must be taken that the dams or littermate's DNA does not contaminate the sample. The process of nursing seeds the puppy's mouth with DNA from the dam's skin and from the cells in the dam's milk, so Wisdom Panel does not recommend testing puppies who are still nursing. However, as soon as puppies are weaned, they can be safely tested following the usual guidelines. Optimal Selection dog profiles and accompanying results are designed to be easily shared or transferred to new owners when needed, free of charge, so an entire litter can be tested with Optimal Selection before they leave their birth home.