I took on my 2-year-old rescue Cocker just at the beginning of lockdown. It has been very hard work with the lockdown I must say! She's also very reactive, and doesn't like going outside when it rains... so today, for example, we've been inside all day (except for a few potty breaks in the garden). She sleeps a lot anyway, so I think she's fine, but we've been doing lots of little training drills, kongs, stuffed balls, chew toys, puzzle games, scent work... she'll still happily doze constantly so I think we are tiring her out, even without taking her for walks. So, while it does feel like being cooped up, it's possible to keep a dog entertained even if just stuck in the house/garden.