I think it was maybe Saturday where I let the cats out on the catio, then came back later and observed that George was clearly NOT inside the catio but rather just outside, nosing around in the grass like he does. Hmm. I was able to call him over and hauled him back indoors, but didn't have the time or wherewithal to figure out how he'd escaped this time. Had the extra layer of netting made it easier for him to climb the bush and up and out somehow?
I found my answer this morning:

The staples that had held the bottom of the chicken wire to the ground had pulled up. This should be simpler to remedy, at least! The cats will be glad; they have been frantic to go outside again and have been charging all over the house and yelling about their discontent.
We finally have the first sign of spring at the house: the snowdrops are up. This is them yesterday:

This is them today:

There are flower and leaf buds appearing on a number of things.
We're still going to dip back down below freezing again on Thursday, Friday, and Saturday nights, but it's a start.
I need to trim the raspberry canes.
I found my answer this morning:

The staples that had held the bottom of the chicken wire to the ground had pulled up. This should be simpler to remedy, at least! The cats will be glad; they have been frantic to go outside again and have been charging all over the house and yelling about their discontent.
We finally have the first sign of spring at the house: the snowdrops are up. This is them yesterday:

This is them today:

There are flower and leaf buds appearing on a number of things.
We're still going to dip back down below freezing again on Thursday, Friday, and Saturday nights, but it's a start.
I need to trim the raspberry canes.