Betty Ann Gould entered "no contest" pleas Thursday in municipal court to two misdemeanor counts of attempted aggravated animal abuse.
Police were able to rescue the two cats from the Willamette River in late November. The animals had been put in a bag before being thrown in the water.
The 62-year-old Gould was also sentenced to five days in jail, but will not serve any additional time because she spent about four days in jail after her Dec. 3 arrest.
The woman told authorities she has given away the estimated 50 to 60 Persian cats she had when she was arrested.
The two rescued cats are living with a Eugene family.