Although social robots increasingly enter our lives, it is not clear how they are perceived. Previous research indicates that there is a tendency to anthropomorphize social robots, at least in the Western culture. One of the most promising roles of robots in our society is companionship. Pets also fulfill this role, which gives their owners health and wellbeing benefits. In our study, we investigated if social robots can implicitly and explicitly be perceived as pets. In an online experiment, we measured implicit associations between pets and robots using pictures of robots and devices, as well as attributes denoting pet and non-pet features, in a Go/No-Go Association Task (GNAT). Further, we asked our participants to explicitly evaluate to what extent they perceive robots as pets and if robots could replace a real pet. Our findings show that implicitly, but not explicitly, social robots are perceived as pets.