The seaside birds were taken from Sussex-based National Gull Rescue and Protection Charity amid rumours of mistreatment of the creatures.
The gull charity, which was founded and run by Tim McKenzie and is the only one of its kind in the UK, shut suddenly in April.
Yesterday Mr McKenzie, 54, from Bexhill, confirmed the charity had been suspended after a series of raids by the RSPCA.
He has consulted a solicitor regarding the matter.
NATIONAL SEAGULL RESCUE SITE CLOSED AS RSPCA NOW PROMOTE THEMSELVES
ST LEONARDS ON SEA , U K (Hastings Observer) - THE Seagull Man of Hastings has hung up his gloves and is now taking on a purely advice based back-seat.
Tim McKenzie, who for years has been helping stricken gulls across 1066 Country, is no longer available for call-outs.
Anyone who finds an injured gull is instead urged to call the RSPCA on 0300 123 4999 or the charity’s Mallydams Wood Wildlife Centre on 0300 123 0723.
The RSPCA hotline is not a 24-hour number, but answerphone messages are checked regularly.
And Mr McKenzie is still available to offer advice on seagulls after changing his charity from National Gull Rescue to National Gull Protection.
He still hopes to be able to hold information stalls similar to one last year which attracted hundreds of gull-friendly passers-by in Priory Meadow.
RSPCA cost Devon and Somerset Fire Brigade £23,000 rescuing seagulls