Twenty-five of the 135 dairy cow herd on the property were put down due to the serious pain and distress they were in.
Those injuries included broken legs, swollen hocks, weeping lesions, swollen joints and infections and fractured legs.
Erasmus faced a maximum jail term of five years' imprisonment and/or a maximum fine of $100,000 and disqualification from owning and or exercising authority in respect of animals.
``Persons in charge of animals have a fundamental obligation for the welfare of those animals. The vast majority of persons in charge of animals on farms take their obligations very seriously,'' Mr Mikkelsen said.
``MPI's animal welfare compliance team cannot be everywhere so it is vital farmers, industry, associated on-farm service providers and the public maintain vigilance and report alleged Animal Welfare Act breaches on our hotline 0800 00 83 33.