Hi Ann
in 1851 Heber Killip,17, is living in the (Ballacojeen) household of John Cain,33,freehold farmer 28 acres 2 men, and wife Elizabeth,32.
The next household (with an address of N.G. = Not Given??) is Jane Cain,54,Widow, with 2 children & a grandchild . Could these be your Cain(e)s or just a coincidence ?
The next three households, Cowley, Brew & Killip are also at Ballacojeen.
Regards