Does a rat free a trapped rat due to empathy or for sociality?

Does a rat release a soaked conspecific due to empathy?

(2016) Lindsay P. Schwartz et al.   ANIMAL COGNITION

Rats demonstrate helping behavior toward a soaked conspecific

(2015) Nobuya Sato et al.   ANIMAL COGNITION

Desire for social contact, not empathy, may explain “rescue” behavior in rats

(2013) Alan Silberberg et al.   ANIMAL COGNITION

Pro-sociality without empathy

(2012) M. Vasconcelos et al.   Biology Letters

The Neuropeptide Oxytocin Facilitates Pro-Social Behavior and Prevents Social Avoidance in Rats and Mice

(2011) Michael Lukas et al.   NEUROPSYCHOPHARMACOLOGY

Empathy and Pro-Social Behavior in Rats

(2011) I. B.-A. Bartal et al.   SCIENCE

Ants, Cataglyphis cursor, Use Precisely Directed Rescue Behavior to Free Entrapped Relatives

(2009) Elise Nowbahari et al.   PLoS One

Putting the Altruism Back into Altruism: The Evolution of Empathy

(2007) Frans B.M. de Waal   Annual Review of Psychology