"Like a bath bomb" — except for cattle, not humans.
Limehills School pupil Jorja Gay made a "trough bomb" for her winning entry in the student section of the Southern Rural Life innovation awards at the Southern Field Days at Waimumu last week.
Jorja (12), who lives on a dairy farm, said she came up with the idea herself, which involved minerals that dairy cattle needed packed into a mould — a large Christmas bauble — and then placed in a water trough.
Jess Miller, from Clinton School, was runner-up for her carry-all wheelbarrow attachment.
The open section was won by Jared Bekhuis, with CowManager which he described as a "Fitbit" for a cow.