The Bichon Frise is a cheerful, affectionate dog that doesn't shed, making it a good choice for allergy sufferers. A standard Bichon Frise is small and needs little exercise, while a teacup is especially well-suited to small living spaces and easy to carry around. The down side to the teacup is that its tiny size makes it more fragile and more prone to the health issues of all kinds.
While there is no official standard for the teacup Bichon Frise, the label usually applies to dogs weighing less than the breed standard of 10 to 18 pounds and particularly to those weighing 4 pounds or less. Dogs so much smaller than normal are often the result of inbreeding between runts, so they are more prone to recessive genetic disorders. Additionally, all teacup dogs are prone to respiratory issues and have problems maintaining body heat and blood sugar levels. They also are more easily injured during normal activity, such as jumping off a chair, and have a high risk of complications during pregnancy and whelping.
All Bichon Frise dogs are prone to separation anxiety and are sometimes difficult to housebreak. Health problems in the breed include hip dysplasia, luxating patellas, Legg-Calve-Perthes disease, primary ciliary dyskinesia and dental problems.