Analysis of almost 1,700 dogs from 172 different breeds revealed pint-sized “toy” breeds like the pug, chihuahua and pomeranian ... have the smallest brain-body ratio. The findings upend ...

It's impossible to deny that this long-haired Chihuahua is howling with her whole heart, even if it is only a fraction of a ...

Pomeranian: These intelligent, energetic dogs have a playful nature. Pomeranians stand 8-14 inches tall and weigh 3-7 pounds. Chihuahua: Famous for their spunky attitude, Chihuahuas are loyal and ...

Chihuahuas are among the smartest dogs because they have the biggest brains for their size, a study has found. The Border ...

Meet Milly, the Puerto Rican chihuahua about to hit the big time as the world's smallest dog. Milly was born three months ago and has maintained the height of 2½ inches for the last three weeks.