We once quickly returned 2 lost pointers because the owner's cell phone# was on the collars. Test your microchip when you visit the vet -- Gwynnie's gave no signal!
chillybuddy cooling vest keep in plastic bag, so you can add water to wet it (crtitical; much of the cooling is evaporative). They wilt in sun above treeline and this thing really does help. Size Medium with a Small girth strap.