Animal DNA tests are now a big markets as they are able to establish the fur colour genes the pets are carrying as well as genetic predispositions. Other useful tests possible include testing to establish the parentage of your pet or pet DNA profiling. Cat DNA testing is now popular as is DNA testing on dogs and DNA tests for horses. DNA samples for these tests can be collected through the use of mouth swabs which mean that the pet owners or breeders can do it without the need of a vet. Another type of test which is in big demand is bird DNA sexing. This type of test will enable breeders to determine with absolute certainty whether a bird is male or female making the mating process far easier that old, inaccurate methods such as the law of attraction.