This model was originally released as #1506 from 1999-2006. It was released mid-year 1999, so it was not pictured in the 1999 catalog. On the 2006 Retired List.
From 2012-2013, the Vet Care Set #755404, included a Palomino Trotting Stock Foal with blanket, Black and White Silver Tabby, Brown Welsh Corgi, Doll, Vet Bag and Bucket with Sponge. This set was available through Target.
From 2015-2017, this model was brought back for the Shire and Corgi Set #9175. Set included the Shire 'A' and the Corgi Dog. This was part of the Best of British Series. On the 2017 Retired List.
Even though there are gaps between years, all of these models appear indistinguishable from each other.