A little late on sharing this but a new Houndeye model is featured in an icon found in a recent Counter-Strike 2 update! It's currently unknown what this model is from, if anything.
Keep in mind, we haven't seen Houndeyes officially in 25 years. Houndeyes were originally planned for Half-Life 2, but were later scrapped. Below is the HL2 Beta model for reference: