I am not well enough versed to comment on if/how dangerous the germs are to you as pregnant woman. DH and I are very laissez faire about the whole thing, but everyone's comfort level is different. Hopefully someone else can talk about germs.
Aside from the germ issue, there are other reasons why you might not want the dog chewing bones on the couch (staining, lying down on the bits, etc.) So, there are several options. One is to feed the bones outside, or if you have a porch you can hose down. Otherwise you can use a plastic sheet (shower curtain) and gate off the area. When the dog drops the bone and looks eagar to do something else, then take it away.
You don't have to let the dog drag the bone all over. We do something in between. When the bone is fresh and has some meat, blood, etc. then the dogs have to eat on the tile kitchen floor or the porch. But once it's white and clean they are aloud into the living room, etc.
Aside from the germ issue, there are other reasons why you might not want the dog chewing bones on the couch (staining, lying down on the bits, etc.) So, there are several options. One is to feed the bones outside, or if you have a porch you can hose down. Otherwise you can use a plastic sheet (shower curtain) and gate off the area. When the dog drops the bone and looks eagar to do something else, then take it away.
You don't have to let the dog drag the bone all over. We do something in between. When the bone is fresh and has some meat, blood, etc. then the dogs have to eat on the tile kitchen floor or the porch. But once it's white and clean they are aloud into the living room, etc.