| 2026-05-05 | Pet pests |
| 2026-02-28 | Affliction treated with a nit comb |
| 2025-07-20 | One of the 10 plagues of Egypt |
| 2025-03-14 | Some epizoa |
| 2025-02-07 | Some sources of typhus |
| 2024-04-11 | Head-scratchers? |
| 2022-09-29 | Pet peeves? |
| 2021-04-21 | Problems that come to a head? |
| 2020-08-09 | Little suckers |
| 2020-06-29 | Parasitic insects that suck |
| 2020-03-05 | Evil intent |
| 2019-11-24 | Head residents? |
| 2019-10-31 | Whopper |
| 2019-07-16 | Subject of a school nurse's inspection |
| 2018-06-17 | Pet peeves? |
| 2018-05-08 | Canine woe |
| 2016-08-17 | Big nits |
| 2013-04-30 | Itchy dog's woe |
| 2012-09-03 | Dog pests |
| 2011-05-28 | Some ectoparasites |
| 2010-06-30 | Cause of head-scratching, perhaps |
| 2010-04-09 | Pet problem |
| 2010-01-24 | Woe for Fido |
| 2008-04-28 | Some creepy-crawlies |
| 2006-12-25 | Head case? |
| 2006-08-02 | Woe for Fido |
| 2004-11-03 | Nits, eventually |
| 2002-10-15 | Wingless parasites |
| 2002-07-07 | Vermin |
| 2002-02-15 | Some ectozoa |
| 2001-12-02 | Dog problem |
| 2000-10-15 | Head hunters' targets |
| 1999-10-31 | Small suckers |
| 1996-07-18 | Case for a vet |
| 1996-04-23 | Parasites |
| 1994-03-12 | Head residents? |