I feel for you. My last pup was in quarantine at home until he was 20 weeks old, which was 10 weeks for us!
Have a look on the facebook group Beyond the Bowl. There are lots of good ideas on there.
Snuffle mats, kongs and kong wobblers, scatter feeding, Lickimats, loo roll inner parcels hidden around the house, teatowel rolls and/or knots - frozen first if she’s chewy. Hiding toys in the bottom of boxes or tubs filled with scrunched up paper (don’t use the paper from deliveries at the moment though, as some of it is being disinfected before despatch).
Target training is a useful tool and any sort of training that gets her brain going, shaping behaviours and teaching things like ‘tidy your toys away’ will wear her out.
As well as all the brain training ideas, use the time to condition her to being handled and remaining calm eg, grooming, claw clipping/grinding, teeth brushing, etc. Lickimats are useful for this and also generally as way of keeping them busy but calm, as the licking itself is relaxing for them.
You can get some socialisation in, by holding her or sitting with her where she can see out and rewarding her for calmly watching people, dogs, cars, trucks etc going past your house and people walking up to your door and knocking/ringing the bell etc.
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