The Saddle Club Horse Sense & Horse Power by Bonnie Bryant

Could this be the End of the Saddle Club?
 
Stevie Lake, Carole Hanson and Lisa Atwood are the best of friends and charter members of The Saddle Club. But now the Saddle Club is in trouble! It seems that Carole and Stevie are too busy with other things and Lisa is getting tired of being the only one at club meetings. 
 
Unless the girls decide to stick together, there will be no Saddle Club and no fun at Pine Hollow Stables.