Indoors it can be housed in vivaria from 150cm long by 60cm deep by 60cm high, as a minimum for an adult pair. The sides of the cage should be opaque except for the front glass to give the dragon some sense of security. The dragon is likely to be very nervous and damage itself in cages made entirely of glass.
According to this model, a Bulldog will age an average of 13 years per human year whereas a Miniature Dachshund only ages about four years. Unfortunately they only calculated the 3+ year ratio for a handful of dog breeds, but this means that my 1-year old Border Collie, Scuttle, is about 10.5 in human years!
Life span. The natural life span of the Border Collie is between 10 and 14 years, with an average lifespan of 12 years. The median longevities of breeds of similar size are usually 12 to 13 years. Leading causes of death are cancer (23.6%), old age (17.9%) and cerebral vascular afflictions (9.4%).