More than 54 census records are available for the McQuaid family, from both 1901 and 1911.
Sample 1901 Prince Edward census records about the McQuaid family available from Ancestry.ca:
A McQuaid family household of at least 8 members residing in the district of Prince Edward was recorded in 1901. The head of household, Russd McQuaid, was born in Ontario in 1868. He identified his heritage as English. By 1901, at the age of 33, he had an occupation that was recorded as "Laborer". Russd's wife was Lizzie McQuaid, who was 32 years old. Lizzie was born in Ontario in 1869. She also identified her heritage as English. Russd and Lizzie had 6 children, 4 boys and 2 girls. In 1887 their eldest child, a girl named Maud, was born. Three years later, in 1890, when Russd was 22 years old and Lizzie was 21 years old their second child, this time a son, who was named Kennith, was born. Then, in 1891, with their two children ages 4 years and 1 year, their third child, Claude, was born. In 1901 another son, their fourth child and third boy, Clayton, was born. With four other children in the household, their fifth child and second girl, Ellis, was born in 1894. She was followed by 1 more child: their son Ralph, born in 1900. Thus, at the time of the 1901 census, this McQuaid family household was filled with 6 children whose ages were 1, 7, 8, 10, 11, and 14 years.