| Clue | Source | Date |
|---|---|---|
| Flo ps for indoor/ outdoor cats and dogs | ||
| Flaps for indoor/outdoor cats and dogs | USA Today | 28 Feb 2024 |
| They let the dogs out | ||
| Domestic flaps | Wall Street Journal | 05 Jul 2018 |
| Domestic flaps | ||
| Flaps for pooches | Wall Street Journal | 03 Apr 2017 |
| Openings for some companions | ||
| Specialized patio panels | ||
| Domestic flaps? |