While Ankh is a rude and annoyingly irritating person to be around unless he likes you just like some pet birds out there, he isn't 100% stupid, especially if he can 'feel' the desires of the ghosts and recognizes them as being the same ones around the time Nia and Tsuna were hurt by Blanche. So while he will be a bit ruffled in the feathers by how their actions led to his humans getting hurt, he understands that it wasn't something the ghosts could control, so after the initial 'You're back?' huff, he will ask for Healing.

He can't help people out without first understanding what he is, and that needs to come from the healing process.