What were the problems with the project sputnik 2?

Project Sputnik 2 faced several challenges, including the limited technology of the time, which resulted in a heavy and bulky spacecraft. The launch vehicle's reliability was also a concern, leading to potential mission failures. Additionally, the harsh conditions of space and the need for effective life support systems for the canine passenger, Laika, posed significant technical difficulties. Ultimately, while the mission was a landmark achievement, it raised ethical questions regarding the treatment of animals in space exploration.