Mojo LOVES (((LOVES))) the everlasting treat ball...we put the everlasting treat disc on one side and put Yorkie Yummies in the other side (where he can try to get them out). He would have this all day, every day, and at night, if we would let him. I normally give it to him when we will be gone or just to have during the day to play w/. LilyGrace never touches hers anymore. Every now and then, she will sit and lick on the treat disc or roll it around to get a small treat out.....I found that they definitely or NOT everlasting in my house!