They deified bulls too. Serapeum of Saqqara - The Tomb of the Apis Bulls. Approximately 64 bulls, plus ritual objects are buried there.
Their is no proof they put bulls in the sarcophagi - that’s an archeologist assumption. The sarcophagi are all empty.
Proof of Ancient High Technology at the Serapeum of Saqqara, Egypt. Chapter 1 [ of 6 ]!
https://www.youtube.com/watch?v=VGtDAHRK8s0