Historical clue formulations

• Los ___, Calif. — 2020-07-03
• Los ___, Calif. — 2019-08-16
• Los ___, West Coast home of Netflix — 2018-12-01
• 4-Downs, south of the border — 2016-07-08
• Spanish kitties — 2007-09-14
• They're treated by veterinarios — 2006-01-21
• Los ___, Calif. — 2005-09-19
• Madrid mousers — 2004-02-26
• Perros chase them — 1999-09-19
• Los _____, Calif. — 1994-07-22