Everyone keeps mentioning how in Alien 3, the first thing to get infected/eaten is a dog. I seem to remember this happening to a rottweiler. But I just saw Alien 3 and the facehugger killed a bull and the alien busted out of that. Did I watch a directors cut with a bull instead of a dog?
If you watch the Assembly Cut on the DVD/ bluray sets (the equivalent of the directors cut, however Fincher refused to be involved), it is a bull like creature that they farm on the prison planet that is the first thing to be a host. The dog was part of the studios considerable recutting .
It's worth watching the Assembly cut, it's far from the sequel you hope for, but a hundred times better than the release version.
It was originally supposed to be a cow/ox, the cow was made & filmed but the studio then decided against it as the Xenomorph would have been too bulky and slow. That's the reason it was then changed to a dog (faster)
The whole idea was a mistake in my eyes as the CGI took a lot away from the film for me.
Alien 3 as a whole was a great concept 'Prison with no weapons etc' just poorly executed.