I've experienced the Lord heal many animals. One time a friend asked me to come over to his home and pray for his cat because she hadn't eaten anything in over a week. The cat was lethargic and it seemed as if she might die. I went over there and prayed for the cat. Afterwards, we had a conversation and forgot about the cat. Ten minutes later, we looked down and the cat was eating.
Your righteousness is like the highest mountains, your justice like the great deep. You, Lord, preserve both people and animals. - Psalm 36:6