Two days in prison gave an animal rights activist facing stealing charges plenty of food for thought, but not much to eat with the campaigner claiming he had to go hungry because there was no vegan option on the menu.

James Warden was remanded to Perth's Hakea Prison this week after he could not raise enough money for bail.

The 25-year-old is facing burglary, stealing and trespass charges after being accused of stealing a dead piglet and a calf from two WA farms last year.

Warden told 7NEWS Perth reporter Elle Georgiou that during his 48 hours in prison, he had to go hungry because his vegan dietary needs were not catered for.

"Some of them just said, 'go and eat some meat' and that kind of thing," he said.

Chevron Right Icon 'They are suffering daily'.

"The experience I had was nowhere near as bad as what animals are going through - they are suffering daily, and I only had to put up with 48 hours in custody."

Warden said despite his prison experience, he won't stop his campaigning.

"I think it's important for society to make changes and recognise animal ethics," he said.

Warden returns to court next month.