Red Wigglers and Rabbit Poop

A neighbor offered her rabbit poop for my worm bin. The poop comes with rabbit bedding and food mixed in with the poop. I think the food is alfalfa. I leave it outside and spray it down with water for a week or two in hope of removing salts, then mix it with dead leaves, and use it as needed to cover kitchen scraps or start a new layer on the worm bin. I have red wigglers in my bin, but lately noticed a few random earthworms which are not red wigglers. I’m assuming they got into the rabbit poop outside and I didn’t notice. I’m always worried that perhaps I didn’t get all the salts of the rabbit poop (just one prolific rabbit) but so far, my worms seem to love the stuff. If earthworms are in it, is that an indication it’s safe for my red wigglers? Also, will the random earthworm harm my bin of red wigglers in any way? I take any earthworm I see to the garden but am concerned I’ve overlooked some since I wasn’t looking for them. Thank you!