Thank you for removing those (invasive) bullfrogs from the wild. Thank you, but no, we would not be able to use them. They need to be humanely dispatched. ODFW https://www.dfw.state.or.us/conservationstrategy/invasive_species/docs/bullfrog_fact_sheet.pdf recommends stunning them, followed by decapitation. You could reach out to ODFW's Invasive species division https://www.dfw.state.or.us/conservationstrategy/invasive_species.asp at either #: Main Phone<personal data hidden> or (800) 720-ODFW [6339] if you would like further technical advice on disposal of these animals. If you caught these adults in a private pond, you might also ask ODFW's advice on location and removal of eggs and juveniles in order to prevent their further development.