Pigs were flying at Friday's League One match between Coventry City and Charlton Athletic.
Fans threw so many small plastic pigs on to the pitch that the protest against team owners delayed the start by about seven minutes.
The incident happened before the match, and when it did start, less than a minute later more pigs were tossed, leading the referee to make both teams leave the pitch. The pigs were cleared and play resumed five minutes later.
Similar incidents occurred in October when the teams played at Charlton's home stadium The Valley.
Coventry and Charlton have fallen on hard times. Coventry, FA Cup winners in 1987 when they memorably beat Tottenham in the final, were relegated from the Premier League in 2001, ending a 34-year stay in England's top division.
Charlton, a Premier League club 10 years ago, were relegated from the second-tier Championship last season.
A 1-1 draw on Friday condemned bottom side Coventry to relegation to League Two, the lowest tier of the Football League.