Pugs are a small breed of dog originally from China. They are solidly built, with a short, wrinkly face and a curled tail. Most pugs are fawn, but can be found in apricot, silver and black too.
Chihuahuas are the world's smallest breed of dog, named after their home state in Mexico. They are very loyal dogs, and are not suitable for a household with young children. They are prone to getting low blood sugar, and need regular feedings.
Beagles are a small to medium sized breed of dog developed in Great Britain. They were originally bred as a hound that tracks game like rabbits by following their smell. Today they are often used at Customs for sniffing out illegal goods.
They have an even temperament and are popular pets.
You wag or waggle something when you wave it backwards and forwards fairly fast. dogs wag their tails when they are happy. People sometimes wag their fingers to tell someone else off.
Trod is the past tense of tread, for example "he trod in some dog poo".