A dog found with a carrier bag containing a large rock tied to her lead in the River Trent is responding well to treatment.
Bella, a German Shepherd-type dog, was rescued from the river near Long Lane, Farndon, on January 6 when a passer-by saw her struggling.
10-year-old Bella was immediately taken for emergency treatment at a local vets.
After a few days she was taken into RSPCA care and since then she has been looked after by staff at Radcliffe Animal Centre in Nottingham.
Ella Carpenter, centre manager at Radcliffe, said:
Bella is currently unavailable for rehoming but the RSPCA will be placing her in a foster home when her condition is stable.
Nottinghamshire Police arrested a 31-year-old woman and a 32-year-old man on suspicion of animal cruelty offences hours after Bella was rescued from the river.
They have been released while the RSPCA continue their investigation.