No, bird mites do not do this. Bird mite infestations originate from birds that are nesting within the house. The mites become a problem when the young birds fledge and the mites in the nest search for a new host to feed on. It is thus important that all nesting material is removed, sealed in plastic bags and discarded, and all access points for birds into the roof be sealed to prevent further reinfestations. No, all children are equally at risk of acquiring head lice.
Transmission occurs very easily through contact from one infected child to another.
Being clean does not prevent infection. Yes, head lice are very easily transmitted from one family member to another. Not everyone will show signs of an infestation and thus all members should be treated at the same time. No, pubic lice are host specific and are not a parasite of dogs. Acquiring public lice from toilet seats is unlikely, although sharing towels with an infested person can result in transmission.