An animal cruelty case against a Tasmanian pig farmer has been adjourned until August.

Gary William Oliver was charged with five counts of cruelty, after an animal activist trespassed on to his Winnaleah piggery in March.

Emma Haswell contacted police after allegedly finding pigs with open wounds, maggot infestations and no fresh water.

Oliver’s company Longerenong Livestock supplies pork to the large supermarket chain Woolworths.

Woolworths is continuing to deal with the producer, but is visiting the farm every fortnight.