Oleander replacement: Desertmarcy is right, AZ rosewood is a great choice. Hopbush will work as well. Tecoma stans is a great flowering shrub...it does freeze back (if you get freezes) but comes back with a vengeance in the spring. Pomegranate can also grow in shrub form. I've had a hard time growing this one, but pineapple guava is another one with pretty flowers and edible fruit. Bee bush is also a cool shrub (Alyosia gra..something), flowers all spring and summer, smells like honey and attracts tons of bees and yellow finches, but it is a medium sized, airy shrub, and when it does get tall, it's lanky (at least in my yard). You can always do a hedge of something boring, like the hopbush, and plant a native vine such as AZ passionflower vine or queen's wreath to spice it up with some flowers.
My black copper marans has a swollen crop. I noticed it on Saturday afternoon (huge baseball size). It's still swollen in the mornings. I had pulled some of the long "stringers" of grass creeping into the garden and I'm guessing she ate one...there's not much else she could have gotten into. She's eating and acting fine, so far. I've read up on the impacted/sour crop...should I try to vomit her even if it doesn't smell nasty yet, or just hope for this to pass?
