Richard Drozd (52), who was fined $16,000 and banned from owning an animal for 15 years, pleaded guilty to eight charges of animal cruelty relating to the severe neglect of three horses and a pony.
RSPCA inspectors took the animals in February 2013 after concerns for their welfare.
Chief inspector Amanda Swift said a stallion was in one of the worst conditions she had seen.
‘Drozd is an experienced horse owner and has the knowledge to know the requirements to care for a horse,’ she said.
‘The treatment of these horses is disgraceful and his actions completely inexcusable.’
The stallion and another horse were treated and rehomed.
The pony and one horse were euthanised because of unrelated medical conditions.
Drozd was ordered to pay more than $10,000 in vet costs.
The RSPCA said Drozd said he could not afford to feed the horses after separating from his wife.