Stages of Development of a Toy Rat Terrier

Rat terriers, originally bred to hunt rats, mice and other small rodents, were developed as a breed in the United States. Toy rat terriers are smaller than standard rat terriers and have been selected for their diminutive size. Both types of rat terriers go through the same stages of development.

  1. Early Development

    • Before 7 weeks of age, all dogs rely solely on their mother and littermates for food and companionship. Puppies cannot eat solid foods until they are 6 to 8 weeks old, and they are not physically or mentally equipped to survive on their own until that time. Breeders will not usually allow a puppy to be purchased and taken home until they are at least 7 to 8 weeks old. Toy rat terriers, because of their smaller size and delicate bones, should be handled with extreme care during this period.

    8-12 Weeks Old

    • Toy rat terriers and other puppies experience rapid physical and mental growth during the first 8 to 12 weeks of life. Puppies also experience what is known as a "fear imprint stage" during 8 to 10 weeks old, meaning that any traumatic experiences that occur during this time can lead to lasting fears and phobias that will last into adulthood. Rat terriers, because of their naturally stubborn personality, will also begin to test the limits of their owner's authority during this time. Many breeders advise establishing ground rules for training and appropriate behavior during this time.

    4-8 Months And Beyond

    • As puppies make the transition from puppyhood to adolescence and adulthood, they will continue to experience physical, emotional and social development changes. As rat terriers and toy rat terriers age, they are more likely to develop skin sensitivities and joint problems than some other dog breeds. If you are concerned about your rat terriers developmental progress, talk to your veterinarian.