Animal welfare organisation, RSPCA, are set to arrive at the annual Appleby Horse Fair, along with six other equine organisations to carry out exhaustion tests on horses.
33 RSPCA officers will also be on the lookout for dogs being left in hot vehicles, following two dogs having to be rescued at last year's event.
Last year, the number of horses being worked to exhaustion was a big issue.
In attendance will be:
Seven people from Blue Cross
Four staff from Bransby Horses
Two donkey welfare advisors from Donkey Sanctuary
Three vets, two senior field officers and an education and campaigns manager from Redwings Horse Sanctuary
Four field officers and one welfare support officer from World Horse Welfare.
Every year we remind people, and almost every year we have an incident to deal with. It does not have to be glorious sunshine for dogs to be at risk.
Around 10,000 Gypsies and travellers, and over 30,000 other visitors attend the Appleby Horse Fair, beginning Thursday 8 June.
It is the largest horse fair in Britain and is considered one of the oldest in Europe.