"This is Muggle my 1/2 Italian Greyhound, 1/2 Cairn Terrier at 7 months old. Muggle is an equal split between the two breeds. He can be the most hyperactive terrier, jumping up onto counters and straight into the air (similar to a Jack Russell), but then can also be so sweet and cuddly like an IG. He loves to cuddle, loves stuffed animals that are as big as he is, and loves to run around in circles when he gets excited. He also loves climbing on the sofa and sweetly burying his head in your neck. With this mix, you get the best of both breeds! A curious little terrier and a loving IG."
The Italian Cairn is not a purebred dog. It is a cross between the Italian Greyhound and the Cairn Terrier. The best way to determine the temperament of a mixed breed is to look up all breeds in the cross and know you can get any combination of any of the characteristics found in either breed. Not all of these designer hybrid dogs being bred are 50% purebred to 50% purebred. It is very common for breeders to breed multi-generation crosses.