Southlake City Council members on June 19 unanimously approved an interlocal agreement to combine animal control services with Colleyville and Keller. The move will be effective Oct. 1 if the other councils approve the agreement to operate animal control services and detain animals in Keller. Keller's existing shelter is undergoing an expansion scheduled for completion in November 2014. The combined services are projected to save the cities money, provide more shelter room, improve services and extend hours.