Around 100 animals face an indefinite stay at Battersea Cats And Dogs Home after coronavirus forced the shelter to close its doors to the public.
Staff across the home's three sites in London, Berkshire and Kent launched a huge effort to find foster homes for around 130 animals in the run-up to the coronavirus lockdown.
But, with rehoming suspended, that left 100 animals in kennels and cattery pens waiting until the lockdown is lifted before they will be able to leave.
Generally, the average length of time cats and dogs spend in one of Battersea's shelters is 25 and 30 days respectively, but now some animals face a significantly longer period on site depending on the length of the lockdown.
With not enough foster homes available among volunteers and staff, behavioural experts and vets were consulted to determine which of the centres' animals would cope best with an extended period at a shelter.
Only staff involved in the direct care of the animals are currently allowed on site, and they are working hard to make sure the animals are well cared for - especially as taking dogs for off-site walks has become more difficult.
The move to shut the shelter doors is thought to be unprecedented. "I believe it may be the first time in our history we've closed to the public", Mr Young added.
Intake has also been suspended - except for emergency cases - so when the shelters are finally able to open again, staff could face a larger-than-average number of animals arriving.
In the meantime, with many charities suffering a hit in funding, Battersea continues to rely on public donations.