Those who are malnourished may need help with feeding and selecting the right foods or require supplements.

BBC: Image of an elderly patient

The RSPCA said many of the birds were extremely weak and dehydrated and needed help with feeding after being rescued.

BBC: Birds to be released in Dorset four weeks after oil rescue

The problems being encountered are not on the whole to do with complex surgery or life-saving treatments, but instead are almost always related to basic care, such as help with feeding or going to the toilet or carrying out basic checks.

BBC: Stafford Hospital: the scandal that shames the NHS