Question

[Shael]

How to consecrate an animal in Satan's name?

If by "consecrate" you mean blessing an animal, similarly to a satanic baptizing for a child, then I think you can just contact Satan through his sigil formally and politely ask for such. You can also do an Aura of Protection on your pet in order to protect it from harm.

If you meant "sacrificing" a pet, then like Argedco already said, we do not do this here. Read https://satanisgod.org