there is no such thing as a micro chihuahua or a pocket chihuahua. micro-size or teacup chihuahuas are usually the runts of a litter and tend to mature with several chihuahua health problems, have a shorter life span and need more care than the average chihuahua.
some even need to be tube fed or bottle fed until their little bodies are developed enough and they can eat on their own. it is also not uncommon to have to pay daily veterinarian fees to keep these so-called ‘pocket or micro chihuahuas’ from becoming a sick chihuahua as they age.