shouldn't be a problem, goats and horses can eat that stuff...the only thing i'm not positive about is the cucumber. Also i think tomato plants are poisonous.
Thanks, I won't add those then and the rest I don't expect them to eat it but they can scratch around and catch in crickets and bugs that are in the vines of the sqaush .
cucumber and any squash family plants/fruit should be fine. I'd stay away from gourds though, as a lot of gourd fruit is non edible for humans. When I turned my chickens into the garden last fall, they were scoffing down the dried squash leaves like they were potato chips.