The holiday home of the US dentist who killed Zimbabwean favourite Cecil the Lion has been vandalised.

Graffitied lettering reading ‘lion killer’ were found scrawled on the garage door of Walter Palmer’s Marco Island, Florida residence on Tuesday, while marinated pigs feet were scattered in the driveway.

Mr Palmer has faced severe public backlash since it was revealed he killed the lion in early July, reportedly paying more than $AU65,000 for the game hunt in Zimbabwe.

• International outcry sees hunts suspended
• Hunter ‘regrets’ killing beloved Zimbabwe lion
• After killing Cecil, dentist ‘wanted elephant next’

The lion was part of an Oxford University research project and was wearing a GPS tracking collar at the time he was lured from the boundaries of the Hwange National Park, in the west of the country.

Officials are currently investigating the vandalism.

Neighbours to Mr Palmer’s $1.1 million residence told NBC2 although they did not condone his actions, two wrongs don’t necessarily make a right.

“It’s pretty pathetic to rush to judgment over something you really don’t have all the answers,” Clayton Breitbach said.

“They committed a crime, they’re saying he committed a crime. I think they committed an obvious one.”

Mr Palmer has remained away from the public spotlight since the furore erupted.

Protestors recently gathered outside his Minneapolis dental practice, placing stuffed animal teddies at the door.

In a letter to the clients of his practice he apologised for the disruption, saying he “deeply regrets” the outcome of the hunt.

“To my knowledge, everything about this trip was legal and properly handled and conducted,” he wrote.

Earlier this week, the maker of Beanie Babies, Ty Inc, announced they were developing a Cecil the Lion stuffed toy with funds to go to the Oxford University Wildlife Conservation Research Unit – the division tracking the Zimbabwean lion before his death.