@s3mp3rr3formanda I wouldn't recommend an undercoat rake for a doodle. A dematting tool is your best bet. I only recommended for small tangles. Try to line brush with a slicker and follow up by combing.
https://www.amazon.com/dp/B0002ARR2W/ref=cm_sw_r_cp_api_i_JateDbZSPBSWA
Be careful bc it's...