Hatchback that will fit your dogs? That's a bit hard. Sure, the Jazz will fit them all, but you'd have to fold up the rear seats. Never mind the other, even smaller hatches.

Ever considered the Revo/Adventure/Crosswind group? Low maintenance, fuel efficient, tough as nails, lots of space, high ground clearance... I use the Revo whenever the need to transport our Golden Retriever arises. Does the job extremely well. Rear quarter windows mean the dog smell is minimized and dual aircon helps a lot in air circulation and cooling at the 3rd row where the dog's at. If you're bringing crates, no need to fold the 2nd row even (depending on crate size, of course). I never use crates. I just fold down the side facing benches at the 3rd row so the dog doesn't roll around. He oftentimes even sits on the seats!