Teacup pigs are really baby potbellied pigs, so they need an adequate diet to prevent health problems later in life. Do not trust the diet the breeder recommends, since many intentionally advise new owners to starve the piglet so it stays small.
Potbellied pigs are social animals, so they do best in an environment with other pigs around. If you do not have another pig, you need to spend a lot of time paying attention to the piglet so it does not get lonely and bored. Pigs are also very smart, so it is important to keep them entertained or they may become moody and destructive.
Pigs also like to dig and root around, and they may damage your home if you don't give them an appropriate outlet. Many pigs enjoy digging in a big pile of blankets that they also use as a bed. Yards are also a good place to let them dig.
It is also important to spay or neuter your pet pigs. Males that are not neutered may become aggressive, and females have heat cycles that may make them difficult to handle at times. You should also trim your pig's hooves occasionally.
It is important to design a special diet for your pig's needs. This can be in the form of commercial hog chow, but never dog or cat kibbles. Supplement the diet with fresh foods, including vegetables. Pigs should have access to fresh, clean water at all times.