“if I fed my RMBs in a yard, I would not be worried one bit about grass and/or soil getting on them unless I’m using some chemical or toxic pesticides. If you are not, i think grass and dirt are ok. Maybe someone else can confirm or refute that though”
Ingesting dirt can lead to roundworms. It happens.
And not all dogs digest bones well, my small breed had to go to the emergency vet, x-ray showed calcified material (ground up bone) in her stomach and colon that was causing her a significant amount of pain. Luckily it passed on it’s own, however, if I give her a bone, I have to monitor and take it away before she gets down to the nitty-gritty.
