Revelation 19:14

14  And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean.

These armies (plural) include all the hosts of heaven, the angels and all who make up the body of Christ. They all come wearing fine linen, white and clean. This indicates that all of their sins have been removed and they have on the righteousness of Christ. All who came rode on white horses so it would seem that there are some manifestations of animals in heaven?

Jude 1:14  And Enoch also, the seventh from Adam, prophesied of these, saying,  Behold, the Lord cometh with ten thousands of his saints,

15  To execute judgment upon all,  and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him.