More than 7 census records are available for the McDermaid family, from both 1901 and 1911.
Sample 1901 MacDonald census records about the McDermaid family available from Ancestry.ca:
A McDermaid family household of at least 7 members residing in the district of MacDonald was recorded in 1901. The head of household, Cobe McDermaid, was born in Ontario in 1833. He identified his heritage as Scotch. By 1901, at the age of 68, he had an occupation that was recorded as "Farmer". Cobe's wife was Sarah McDermaid, who was 59 years old. Sarah was born in Ontario in 1842. She identified her heritage as Irish. Cobe and Sarah had 5 children, 3 boys and 2 girls. In 1871 their eldest child, a girl named Phebe, was born. Two years later, in 1873, when Cobe was 40 years old and Sarah was 31 years old their second child, this time a son, who was named Henry, was born. Then, in 1877, with their two children ages 6 years and 4 years, their third child, Steven, was born. In 1901 another daughter, their fourth child and second girl, Jessie, was born. With four other children in the household, their fifth child and third boy, Archy, was born in 1885. Thus, at the time of the 1901 census, this McDermaid family household was filled with 5 children whose ages were 16, 21, 23, 27, and 30 years.