Hi,
Why not try the RSPB or a local nature group, they are normally more accommosating than the RSPCA and as they are birdy people will be able to give you good advice. As for your daughter, do what I did when mine had the lurgie, call your friends who have kids who have not had it, and get them together, it's better that the child has it earlier rather than later, that's what mums used to do years ago and it hasn't mine any harm, nor me and the most infectous part is the leading up to the spots coming out, once they are out, it'snot so bad. Good luck.