Tim Jones, a livestock farmer from Worcestershire, told Daybreak that "things are undoubtedly tough" for farmers.
He said a harsh winter has been followed by a run of dry weather, which has left livestock farmers like him, "desperately short of grass" for the sheep.
"Input costs have gone up, with animal feed now 18% more expensive than it was 12 months ago", he added.
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Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.
The 24-year-old was charged with 14 counts of wounding with intent to do grievous bodily harm and one count of throwing a corrosive fluid.
Winds will veer northerly overnight with colder air streaming in over the next few days.