Yes but it will take time.
Not sure what you mean here, but when a bovine is dehorned, the horns don't grow back, especially if they were cut at the root and not an inch away from the skull. If the horns were cut only an inch away from the skull, they still will grow, but not normally like they would if they were not cut off.
Not if the dehorning process was properly done! Horns must be cut right to the base of the skull, not an inch or a sixteenth of an inch to spare, in order for them to not grow back. If a little bit of horn is left (even a tiny little bit), it will grow back, for sure. But, the horn will not grow back as normally as it would if it were not cut off in the first place.
no
You can disbud goats with a disbudding iron when they are little kids but when they are adults you should only cut the tip off the horn so they aren't sharp as when the horns grow there are blood vessels that grow with them.
starfish
yes :)
starfish
Deforestation is caused which means that they are being cleared faster than they can grow back.
Rhinoceros horns are made out of solid keratin. Keratin is the same material that fingernails and hair are made of. Also like fingernails, the horn can grow back if it is cut.
Yes, they do! You can cut them in any way you want and they will grow back!
No, the bones will not grow back. Ever.
no