Animals will experience world to come:
Animals will still be round in the future, in the times of Moshiach and period of Olam Haba when the entire earth will be filled with the knowledge of G-d. These animals will not be regular animals but will have intellectual capability and will use it comprehend G-d. On this the verse states “Lo Yeirau Velo Yashchisu…Ki Malah Haretz Deah Es Hashem.” This does not just mean that animals will no longer hurt others, but means that they themselves will have Knowledge of G-d.
 Keser Shem Tov 395; Maggid Dvarav Leyaakov 100
 Yeshayahu 11/9