Simple past tense and past participle of breastfeed.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "breastfed" in a sentence
"The Pumpkin breastfed for three days short of two years."
"I'm a twin – second to arrive – and my mother breastfed us together."
"Individually, several other infections (including conjunctivitis and urinary-tract infections) were less common among exclusively breastfed infants, but not to a statistically significant degree."