Learning their boundaries this way will take consistency, but will make the training solid. You can also try putting in chicken wire, cement, or large rocks where they get out. You can also try getting a shock collar and shocking them whenever they get too close to the fence.
Sorta like having an electric or invisible fence, but you do the shocking and your landloard doesn't have to see "ugly" electric fencing. As far as Sadie, you may have to crate her or lock her in a dog-proofed room. With Gator, use a check cord, call him and bump the check cord, then start reeling him in.
Walking them on a leash twice a day for 45 minutes each time is better than leaving them out in the yard all day- structured exercise works better. Both are old enough to be crated for the duration of a working day. Keep them confined to the room you are in when you are home so you can supervise them.
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