Meet Tizzy All about Tizzy Tizzy is a 1 year old female American Blue Heeler who weighs 40 pounds and has been with us for 37 days. Note that many dogs do not reach full size until they are about a year and a half old. The weight listed here is the dog's current weight. Photos (click for full-size) Additional Information Housetrained: Unknown or unspecified Has lived with animals: No Has lived with children: No × < >