All 9 soviet space dogs, top to bottom:
Laika - Sputnik 2, November 3 1957: First living being to reach space, DIED IN ORBIT.
Belka and Strelka - Sputnik 5, August 19 1960: First living beings to reach space and return ALIVE.
Pchyolka and Mushka - Sputnik 6, December 1 1960: Reached orbit, DIED ON REENTRY after a malfunction activated the capsule’s self-destruct system.
Chernushka - Sputnik 9, 9 March 1961: First dog to return alive without a fellow companion.
Zvyozdochka - Sputnik 10, 25 March 1961: Last dog to go into orbit before the first human, Yuri Gagarin, did, she was also named by him.
Veterok and Ugolyok - Cosmos 110, 22 February 1966: Lasting 22 days in orbit, it became the longest space flight by dogs, they were also the last soviet space dogs.