yes i think they did.
bread and animals
They had medevil guntype weapons that would stun the animals. They soon feared the egyptians and were basically their slaves
yes
The ancient Egyptians mummified their pets and animals because they wanted them to go to the afterlife with them.
The Nubians, The Romans
If by poor Ancient Egyptians you mean the peasant farmers then they would be using oxen as draught animals.
The Sphinx is on of the most popular animal that the Egyptians had in fact the Egyptians worship them.
to contact with each other, and to contact with the gods through scrolls
Cats I know for sure, because they worshiped them. Anything beyond that is I don't know, although I think they found some mummified fruit for the Pharaohs to take with them in the afterlife, (I'm not sure about that though, cause I only heard it once).
Egyptians
No it was not built by Egyptians