People living in small, confined spaces like condominiums or apartments are attracted to toy dogs because of their size. Generally, toy dogs only increase up to 20 times their birth weight. Adult toy dogs only weigh between one and ten kilograms. They typically reach their adult weight and size in a period of eight months. But not all toy dogs are alike. Some are active and require a lot of exercise, some are barkers, some shed more than others and some are not good with other pets. A particular group of people that needs to consider these differences in toy dogs carefully are the allergy sufferers. An allergy should not stop anyone from enjoying the company of a pet dog.

There are no dogs that are "hypoallergenic". But there are breeds that considerably produce less dander, which causes the allergies in pet owners. Among toy dogs, the following breeds are particularly favorable for people with allergies:

The Chinese Crested is known as a hairless dog, but there are actually two varieties, the hairless and the powderpuff. The hairless variety is not completely bald but has hair on the top if its head, feet and tail. The powderpuff has hair that covers its entire body. The hairless is best for people with allergies, but even the powderpuff does not shed much. It also comes in a variety of colors. Its life span is 12 to 15 years, adult weight is 5 to 10 pounds and adult height is 11 to 13 inches.

The Italian Greyhound is a good choice because it is clean and odorless. It is a miniature of the greyhound and is affectionate and makes a good family dog. Its life span is 13 to 15 years, adult weight is 7 to 12 pounds and adult height is 13 to 15 inches.

The Maltese's coat of long, white hair resembles human hair. It requires good grooming, but does not shed much. It is a good family pet, but its size does not make it suitable for rough play. It is gentle and affectionate and is a good pet for the elderly. It makes a good watch dog as well. The Maltese's life span is 12 to 15 years, adult weight is 6 to 8 pounds and adult height is 6 to 8 inches.

The Shih Tzu has hair instead of fur thus making it good for owners with allergies. It is a small but sturdy dog and its gentle and affectionate nature makes it a good choice for children and the elderly. Its long coat requires daily grooming to avoid matting. Its life span ranges from 12 to 14 years, adult weight is 9 to 16 pounds and adult height is 8 to 11 inches.

The Toy Poodle does not shed much. It makes a good watch dog and is a lively companion. It is perfect for apartment or city-dwellers, but hates to be alone. It is an excellent pet for children and the elderly. Its life span is 10 to 14 years, adult weight is 6 to 9 pounds and grows up to 10 inches.