I used to just use money, but I’ve become makpid to do chickens if I can, since it’s a kiddush Hashem to combat the anti-Torah liberals.
Funny story–went with expecting wife one year. Asked for 1 rooster for me, and both a rooster and a hen for her. Chassidish kid manning the station was all confused–why does she need two? Older chassidish dude told the kid don’t worry about it, just give them the chickens.