Hi Gray,
Something isn't quite right here .......
According to Ancestry's transcription of the 1841 Census, living at West Forest Farm were:
James Boyd, age 38 (born c1803), Farmer
Christian Hay age 35 (born c1806)
John Boyd, age 12 (born c1829)
James Boyd, age 10 (born c1831)
Janet Boyd, age 8 (born c1833)
Joseph Boyd, age 6 (born c1835)
Jean Boyd, age 4 (born c1837)
Christian Boyd, age 2 (born c1839)
Betty Boyd, age 2 (born c1839)
By 1851, Farm now called Wester Forrester ....
James Boyd, age 42 (born c1809), Farmer
James Boyd, age 20 (born c1831)
Janet Boyd, age 18 (born c1833)
Joseph Boyd, age 16 (born c1835)
Jean Boyd, age 14 (born c1837)
Elizabeth (Betty) Boyd, age 12 (born c1839)
Christina (Christian Boyd), age 10 (born c1841)
Agnes Boyd, age 8 (born c1843)
Mary Boyd, age 6 (born c1845)
Ann Boyd, age 3 (born c1848)
By 1861, now at 'Lellsickhills' Cambuslang .... (Ancestry's version of Crookedshields?)
James Boyd, age 61 (born c1800), Farmer
Jean (Jane) Boyd, age 24 (born c1838)
Christina Boyd, age 19 (born c1842)
Agnes Boyd, age 17 (born c1844)
Mary Boyd, age 14 (born c1847)
Ann Boyd, age 12 (born c1849)
Continued .....