These are foxes. You can own purchase them on Shard Seekers for 75 shards. They come in cubs, or adults, your choice. (This picture is the achievement when you buy your first pet.) If your fox is an adult, you can use your hobbit (if you have one) to ride the fox.
The foxes emotes are SIT.
The fox can come in many colors, such as Gray, Light Gray, White, and common orange(fur colors). Its eyes come in colors depending on the fur color. What i mean by this is that if you go on the fur color white, there are some eye colors you can choose from. If I go on the common orange, there are different colors for that fur color.