Twice a year.
Chihuahuas come from Mexico and the state is Chihuahua.
Chihuahuas originally came from the Mexican capital Chihuahua.
chihuahuas are from all over the world! they come from Souix falls.
not if you don't bother them
Mexico.
Females come into heat every 21 days, plus or minus.
Chihuahuas are dogs. Not babies. Dogs should be loved of course but don't give them shoes. It looks silly. But if their feet start to blister from heat then yes, but only for that purpous.
they come in different sizes
Every 6 months.
By the 2nd or 3rd heat which is about one and half or two yrs old.
Most pets lead sufficently artificial lives that they will go into heat according to their own rhythm and regardless of seasons. Hence chihuahuas can have puppies at any time of year.