The animal welfare charity is concerned the birds have been gaining access to waste products from a local brewery or alcohol producer.
RSPCA officers have collected a number of birds exhibiting the same symptoms in recent weeks.
Birds from places such as Dawlish, Seaton, Colyton, Exmouth, Exeter, Sidmouth, Starcross and Budleigh Salterton have been treated.
SWW to build huge new Churston solar farm
Council could opt out of building and lease the land instead
MP highlights Devon's dentistry 'crisis'
'People are in pain but are unable to access treatment'
Work on ‘once-in-a-generation’ Newton Abbot project back on track
'Newton Abbot is a fantastic place'
Complaints made after animal activity licence backlog
It's taking North Devon Council up to 6 months
City draw at home
Reece Cole saves a point for Exeter
Cars damaged in bid to buy cheaper
Substance poured on engine to cause fault
