i think your right mate,i had rspca hat my house someone reported for haveing a pit bull anyway he looked a the dog and reckoned it had bull in him,the rspca told me just to have him registred
The RSPCA told you to do something?
Not being funny mate, but they got no right or Authority to tell you to do anything, nor as far as I'm aware do you have to let them in to your house, or in fact even acknowledge them, they are a Charity, not a Law Enforcement Agency, they may well return with a Policeman and a warrant but even then it's only the Policeman who has a right of entry.